Aerial image and commercial map real-time fusion method and device under broadband ad hoc network

Abstract

The invention relates to an aerial photo and commercial map real-time fusion method and device under a broadband ad hoc network. The method comprises the following steps of: transmitting an aerial photo to a server in real time by using a broadband ad hoc network radio station in a place which cannot be covered by the Internet, performing picture fusion and coordinate calculation by the server, notifying each terminal, and covering the aerial photo on a specified position on a map according to a coordinate position after the terminal downloads the aerial photo, so that the aerial photo can be used. According to the method, the problem that aerial photos cannot be fused, distributed and used in real time in places which cannot be covered by the Internet is solved; by adopting the method, real-time splicing and fusion are carried out on the aerial images under the broadband ad hoc network, the terminal in the network is notified to download the aerial images in real time, and finally the aerial images are covered and used on a commercial map, so that the aerial images are used on the map in real time.

Description

Technical Field

[0001] The present application relates to the technical field of ad hoc networks, and in particular to a method and device for real-time fusion of aerial images and commercial maps in a broadband ad hoc network. Background Art

[0002] In more economically developed areas, maps tend to be more complete. In areas that are not covered by the Internet, map accuracy is very low, and it is difficult to use clearer and more accurate maps on commercial maps.

[0003] Most of the existing technologies rely on the Internet. Areas that are not covered by the Internet are basically blind spots on the map. The existing technologies have defects in real-time performance and cannot use aerial photos on the map in a more real-time manner. Summary of the invention

[0004] Based on this, it is necessary to provide a method and device for real-time fusion of aerial photos and commercial maps in a broadband self-organizing network to address the above technical problems. The method realizes the real-time splicing and fusion of aerial photos in a broadband self-organizing network, notifies the terminals in the network to download in real time, and finally overlays them on the commercial map.

[0005] A method for real-time fusion of aerial images and commercial maps in a broadband ad hoc network, the method comprising: In areas where the Internet is not available, aerial photos are transmitted back to the server in real time via broadband ad hoc networks; aerial photos are pictures with coordinates, and the picture transmission process adopts a method of shooting and transmitting at the same time.

[0006] The server stitches and fuses the received aerial photos and calculates the coordinates to obtain the longitude and latitude information that is compatible with several map engines.

[0007] The format of the spliced ​​and fused images is converted and compressed, the obtained target image is stored in a file server, and the download address and latitude and longitude information of the target image are saved in a database.

[0008] The server notifies each terminal in the network to download and use the latest aerial image. After receiving the message, the terminal downloads the aerial image according to the download address provided by the server, and overlays the aerial image on the specified position on the map according to the latitude and longitude information of the aerial image.

[0009] In one embodiment, the server performs splicing and fusion and coordinate calculation on the received aerial images to obtain longitude and latitude information compatible with several map engines, including: The server stitches and fuses the received aerial images to generate a panoramic image with longitude and latitude; the panoramic image is a tif format image The longitude and latitude information of the BD09, WGS84 and GCJ02 coordinate systems compatible with several map engines are calculated according to the projection coordinates of the panoramic image; the longitude and latitude information includes: the longitude and latitude of the upper left corner, the longitude and latitude of the lower left corner, the longitude and latitude of the upper right corner and the longitude and latitude of the lower right corner.

[0010] In one of the embodiments, the image obtained by stitching and fusion is an image in tif format.

[0011] The format of the spliced ​​and fused images is converted and compressed, the target images are stored in the file server, and the download address and latitude and longitude information of the target images are saved in the database, including: Convert the stitched and fused images from tif format to png or jpg format.

[0012] Compress the png or jpg format image to a preset size while keeping the aspect ratio unchanged to obtain the target image.

[0013] The target image is stored in the file server, and the download address and longitude and latitude information of the target image are saved in the database.

[0014] In one embodiment, the terminal includes a computer terminal and a mobile terminal; the terminal in the network is connected to the system through a broadband ad hoc network.

[0015] In one embodiment, the server notifies each terminal in the network to download and use the latest aerial image. After receiving the message, the terminal downloads the aerial image according to the download address provided by the server, and overlays the aerial image on a specified position on the map according to the latitude and longitude information of the aerial image, including: The server publishes the latitude and longitude information and the download address of the target image to the corresponding topic, and notifies each terminal in the network to download and use the latest aerial image.

[0016] After receiving the message, the terminal subscribed to the topic downloads the aerial image according to the download address provided by the server, and obtains the latitude and longitude information of the aerial image according to the coordinate system of the map engine used by the terminal.

[0017] The terminal overlays the aerial image on the specified position on the map based on the latitude and longitude information of the aerial image.

[0018] A device for real-time fusion of aerial images and commercial maps in a broadband ad hoc network, the device comprising: The aerial image transmission module is used to transmit aerial images in real time to the server through broadband ad hoc networks in places where the Internet cannot reach. Aerial images are pictures with coordinates, and the picture transmission process adopts the method of shooting and transmitting at the same time.

[0019] The aerial image fusion and coordinate calculation module is used by the server to stitch and fuse the received aerial images and calculate the coordinates to obtain the longitude and latitude information that is compatible with several map engines.

[0020] The mosaic image format conversion and compression module is used to convert and compress the image obtained by mosaic fusion, store the obtained target image in the file server, and save the download address and latitude and longitude information of the target image in the database.

[0021] Aerial image and commercial map fusion module, the user server notifies each terminal in the network to download and use the latest aerial image. After receiving the message, the terminal downloads the aerial image according to the download address provided by the server, and overlays the aerial image on the specified location on the map according to the latitude and longitude information of the aerial image.

[0022] In one of the embodiments, the aerial image fusion and coordinate calculation module is also used by the server to stitch and fuse the received aerial images to generate a panoramic image with longitude and latitude; the longitude and latitude information of the BD09, WGS84 and GCJ02 coordinate systems compatible with several map engines are calculated based on the projection coordinates of the panoramic image; the longitude and latitude information includes: the longitude and latitude of the upper left corner, the longitude and latitude of the lower left corner, the longitude and latitude of the upper right corner, and the longitude and latitude of the lower right corner; the panoramic image is an image in tif format.

[0023] In one of the embodiments, the image obtained by stitching and fusion is an image in tif format; the stitching image format conversion and compression module is also used to convert the image obtained by stitching and fusion from tif format to a picture in png format or jpg format; compress the picture in png format or jpg format to a preset size while keeping the aspect ratio unchanged to obtain a target picture; and store the target picture in a file server, and save the download address and latitude and longitude information of the target picture in a database.

[0024] In one embodiment, the terminal includes a computer terminal and a mobile terminal; the terminal in the network is connected to the system through a broadband ad hoc network.

[0025] In one of the embodiments, the aerial image and commercial map fusion module is also used for the server to publish the longitude and latitude information and the download address of the target image to the corresponding topic, and notify each terminal in the network to download and use the latest aerial image; after receiving the message, the terminal subscribed to the topic downloads the aerial image according to the download address provided by the server, and obtains the longitude and latitude information of the aerial image according to the coordinate system of the map engine used by the terminal; the terminal overlays the aerial image on the specified position on the map according to the longitude and latitude information of the aerial image.

[0026] The above-mentioned method and device for real-time fusion of aerial images and commercial maps under broadband self-organizing network, the method includes: in places where the Internet cannot cover, using broadband self-organizing network radio, transmitting aerial images to the server in real time, the server performs image fusion and coordinate calculation, and notifies each terminal, after the terminal downloads the aerial image, according to the coordinate position, the aerial image is overlaid on the designated position on the map, and the aerial image can be used. This method solves the problem that aerial images cannot be fused and distributed in real time in places where the Internet cannot cover; this method is used to perform real-time splicing and fusion of aerial images under broadband self-organizing network, and real-time notification of the terminals in the network to download, and finally overlay and use on the commercial map, so that the aerial image can be used on the map in a more real-time manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of a flow chart of a method for real-time fusion of aerial photos and commercial maps in a broadband ad hoc network in one embodiment; Figure 2 A schematic diagram of a picture taken by a mobile phone in another embodiment; Figure 3 This is a spliced ​​and fused image in another embodiment; Figure 4 The present invention is a structural block diagram of a device for real-time fusion of aerial photos and commercial maps in a broadband ad hoc network in one embodiment. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0029] In one embodiment, Figure 1 As shown, a method for real-time fusion of aerial images and commercial maps in a broadband ad hoc network is provided, and the method includes the following steps: Step 100: In places where the Internet is not available, the aerial photos are transmitted back to the server in real time through a broadband ad hoc network; the aerial photos are pictures with coordinates, and the picture transmission process adopts a method of shooting and transmitting at the same time.

[0030] Specifically, in areas where the Internet is not available, aerial photography generates a series of images with coordinate systems, which are then transmitted back to the server via a broadband ad hoc network, one image at a time.

[0031] Aerial images are images taken by drones.

[0032] Step 102: The server performs splicing and fusion and coordinate calculation on the received aerial photos to obtain longitude and latitude information compatible with several map engines.

[0033] Specifically, after the aerial image is completed, the server uses image stitching technology to generate a panoramic image, which is a tif image with coordinates. The tif image is read and the longitude and latitude information of BD09, WGS84 and GCJ02 are calculated based on the projection coordinates of the tif image to adapt to various commercial map engines.

[0034] The specific steps for the server to stitch and fuse the received aerial images include: 1) Use the Stitcher_create of the opencv module to pass in image data to achieve image stitching 2) Panoramic image contour extraction; 3) Calculate the bounding box of the largest contour; 4) Extract ROI (Region of Interest) from the stitched image using bounding box information; 5) Save the final stitched image.

[0035] In a specific embodiment, the image taken by the drone is shown in Figure (2), and the spliced ​​and fused image is as follows: Figure 3 shown.

[0036] Step 104: convert and compress the image obtained by splicing and fusion, store the obtained target image in the file server, and save the download address and latitude and longitude information of the target image in the database.

[0037] Specifically, the image obtained by stitching and fusion is a tif image, which is converted into a png / jpg image and compressed into a specified size, 10M by default, and finally stored in a file server.

[0038] Step 106: The server notifies each terminal in the network to download and use the latest aerial image. After receiving the message, the terminal downloads the aerial image according to the download address provided by the server, and overlays the aerial image on the specified position on the map according to the latitude and longitude information of the aerial image.

[0039] Specifically, the server transmits the latitude and longitude of the aerial image and the download address to the terminal in the network through the message queue; after receiving the message, the terminal downloads the aerial image and overlays the aerial image on the map engine according to the latitude and longitude information. In this way, a clearer and more accurate aerial image can be used.

[0040] In the above-mentioned method for real-time fusion of aerial images and commercial maps under broadband self-organizing network, the method includes: in places where the Internet cannot cover, using broadband self-organizing network radio, transmitting aerial images to the server in real time, the server performs image fusion and coordinate calculation, and notifies each terminal, after the terminal downloads the aerial image, according to the coordinate position, the aerial image is overlaid on the designated position on the map, and the aerial image can be used. This method solves the problem that aerial images cannot be fused and distributed in real time in places where the Internet cannot cover; this method is used to perform real-time splicing and fusion of aerial images under broadband self-organizing network, and real-time notification of the terminals in the network to download, and finally overlay and use on the commercial map, so that the aerial image can be used on the map in a more real-time manner.

[0041] In one of the embodiments, step 102 includes: the server stitches and fuses the received aerial photos to generate a panoramic image with longitude and latitude; the panoramic image is an image in tif format; the longitude and latitude information of the BD09, WGS84 and GCJ02 coordinate systems compatible with several map engines are calculated based on the projection coordinates of the panoramic image; the longitude and latitude information includes: the longitude and latitude of the upper left corner, the longitude and latitude of the lower left corner, the longitude and latitude of the upper right corner, and the longitude and latitude of the lower right corner.

[0042] Specifically, the projected coordinate system is defined in a two-dimensional plane. The projected coordinate system is always based on the geographic coordinate system. The location is identified by the x and y coordinates on the grid, and its origin is at the center of the grid. Each location has two values, which are the coordinates relative to the center location. One specifies its horizontal position and the other specifies its vertical position. Within the two-dimensional space, the length, angle and area of ​​the projected coordinate system are constant.

[0043] The BD09 coordinate system is a coordinate system used by Baidu.

[0044] The GCJ02 coordinate system is a geographic coordinate system developed by the National Administration of Surveying, Mapping and Geoinformation of China. It is used by Amap and Tencent Maps.

[0045] WGS84 is currently the most commonly used geographic coordinate system in the world and is commonly used in the Global Positioning System and many other location application services.

[0046] The latitude and longitude information of BD09, WGS84 and GCJ02 coordinate systems can be calculated based on the projection coordinates of the panorama in tif format, which can be adapted to a variety of commercial map engines. The specific steps include: 1) Use the gdal method of the osgeo module to read the tif image (WGS UTM projection), read the image geographic information, and extract the geographic coordinate system information.

[0047] 2) Use the osr module to convert the projection coordinates to WGS84 longitude and latitude coordinates.

[0048] 3) Convert the longitude and latitude of the WGS84 coordinate system into the GCJ02 coordinate system information, and add the corresponding offset to the WGS84 coordinates to complete the conversion.

[0049] 4) The longitude and latitude of the GCJ02 coordinate system can be converted into BD09 coordinate system information by encrypting and offsetting it.

[0050] In one of the embodiments, the image obtained by stitching and fusion is an image in tif format; step 104 includes: converting the image obtained by stitching and fusion from tif format to a picture in png format or jpg format; compressing the picture in png format or jpg format to a preset size while keeping the aspect ratio unchanged to obtain a target picture; and storing the target picture in a file server, and saving the download address and latitude and longitude information of the target picture in a database.

[0051] Specifically, since the tif image is very large and inconvenient for terminal devices to use, it is necessary to convert the tif image into a png / jpg image and compress it into a png / jpg image of a specified size. When compressing, the aspect ratio of the current image size needs to be kept unchanged to avoid image deformation. After compression, the target image is stored in the file server, and the download address and latitude and longitude information of the target image are saved in the database.

[0052] In one embodiment, the terminal includes a computer terminal and a mobile terminal; the terminal in the network is connected to the system through a broadband ad hoc network.

[0053] In one of the embodiments, step 106 includes: the server publishes the longitude and latitude information and the download address of the target image to the corresponding topic, and notifies each terminal in the network to download and use the latest aerial image; after receiving the message, the terminal subscribed to the topic downloads the aerial image according to the download address provided by the server, and obtains the longitude and latitude information of the aerial image according to the coordinate system of the map engine used by the terminal; the terminal overlays the aerial image on the specified position on the map according to the longitude and latitude information of the aerial image.

[0054] Specifically, the server publishes the longitude and latitude information and the download address of the aerial image to the corresponding topic, and notifies each terminal in the network to download and use the latest aerial image (i.e. the target image after splicing, fusion and compression). The terminal includes a computer terminal or a mobile terminal, etc. The terminals in the network are connected to the system through a broadband ad hoc network. After receiving the message, the terminal that has subscribed to the topic downloads the aerial image according to the download address provided by the server, and obtains the longitude and latitude information of the aerial image according to the coordinate system of the map engine used by the terminal; the terminal in the network overlays the aerial image on the map according to the coordinate values ​​of the four points of the aerial image, so that the terminal users can use clearer and more accurate aerial images.

[0055] It should be understood that although Figure 1The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 1 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0056] In one embodiment, Figure 4 As shown, a device for real-time fusion of aerial images and commercial maps in a broadband ad hoc network is provided, including: an aerial image return module, an aerial image fusion and coordinate calculation module, a splicing image format conversion and compression module, and an aerial image and commercial map fusion module, wherein: The aerial image transmission module is used to transmit aerial images in real time to the server through broadband ad hoc networks in places where the Internet cannot reach. Aerial images are pictures with coordinates, and the picture transmission process adopts the method of shooting and transmitting at the same time.

[0057] The aerial image fusion and coordinate calculation module is used by the server to stitch and fuse the received aerial images and calculate the coordinates to obtain the longitude and latitude information that is compatible with several map engines.

[0058] The mosaic image format conversion and compression module is used to convert and compress the image obtained by mosaic fusion, store the obtained target image in the file server, and save the download address and latitude and longitude information of the target image in the database.

[0059] Aerial image and commercial map fusion module, the user server notifies each terminal in the network to download and use the latest aerial image. After receiving the message, the terminal downloads the aerial image according to the download address provided by the server, and overlays the aerial image on the specified location on the map according to the latitude and longitude information of the aerial image.

[0060] In one of the embodiments, the aerial image fusion and coordinate calculation module is also used by the server to stitch and fuse the received aerial images to generate a panoramic image with longitude and latitude; the longitude and latitude information of the BD09, WGS84 and GCJ02 coordinate systems compatible with several map engines are calculated based on the projection coordinates of the panoramic image; the longitude and latitude information includes: the longitude and latitude of the upper left corner, the longitude and latitude of the lower left corner, the longitude and latitude of the upper right corner, and the longitude and latitude of the lower right corner; the panoramic image is an image in tif format.

[0061] In one of the embodiments, the image obtained by stitching and fusion is an image in tif format; the stitching image format conversion and compression module is also used to convert the image obtained by stitching and fusion from tif format to a picture in png format or jpg format; compress the picture in png format or jpg format to a preset size while keeping the aspect ratio unchanged to obtain a target picture; and store the target picture in a file server, and save the download address and latitude and longitude information of the target picture in a database.

[0062] In one embodiment, the terminal includes a computer terminal and a mobile terminal; the terminal in the network is connected to the system through a broadband ad hoc network.

[0063] In one of the embodiments, the aerial image and commercial map fusion module is also used for the server to publish the longitude and latitude information and the download address of the target image to the corresponding topic, and notify each terminal in the network to download and use the latest aerial image; after receiving the message, the terminal subscribed to the topic downloads the aerial image according to the download address provided by the server, and obtains the longitude and latitude information of the aerial image according to the coordinate system of the map engine used by the terminal; the terminal overlays the aerial image on the specified position on the map according to the longitude and latitude information of the aerial image.

[0064] For the specific definition of the device for real-time fusion of aerial photos and commercial maps under broadband ad hoc network, please refer to the definition of the method for real-time fusion of aerial photos and commercial maps under broadband ad hoc network mentioned above, which will not be repeated here. Each module in the above-mentioned device for real-time fusion of aerial photos and commercial maps under broadband ad hoc network can be implemented in whole or in part by software, hardware and their combination. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0065] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the present application. It should be noted that, for a person of ordinary skill in the art, several modifications and improvements may be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for real-time fusion of aerial images and commercial maps in a broadband ad hoc network, characterized in that: The method comprises: In places where the Internet is not available, the aerial images are transmitted back to the server in real time through a broadband ad hoc network; the aerial images are pictures with coordinates, and the picture transmission process adopts the method of taking and transmitting at the same time; The server performs splicing and fusion and coordinate calculation on the received aerial images to obtain longitude and latitude information that is compatible with several map engines; The image obtained by splicing and fusion is converted into a format and compressed, the obtained target image is stored in a file server, and the download address of the target image and the latitude and longitude information are saved in a database; The server notifies each terminal in the network to download and use the latest aerial picture. After receiving the message, the terminal downloads the aerial picture according to the download address provided by the server, and overlays the aerial picture on the specified position on the map according to the latitude and longitude information of the aerial picture.

2. The method for real-time fusion of aerial images and commercial maps in a broadband ad hoc network according to claim 1, characterized in that: The server performs splicing and fusion and coordinate calculation on the received aerial images to obtain longitude and latitude information compatible with several map engines, including: The server stitches and fuses the received aerial photos to generate a panoramic image with longitude and latitude; the panoramic image is an image in tif format The longitude and latitude information of the BD09, WGS84 and GCJ02 coordinate systems compatible with several map engines are calculated according to the projection coordinates of the panoramic image; the longitude and latitude information includes: the longitude and latitude of the upper left corner, the longitude and latitude of the lower left corner, the longitude and latitude of the upper right corner and the longitude and latitude of the lower right corner.

3. The method for real-time fusion of aerial images and commercial maps in a broadband ad hoc network according to claim 1 is characterized in that: The image obtained by splicing and fusion is an image in tif format; The image obtained by splicing and fusion is converted into a format and compressed, the obtained target image is stored in a file server, and the download address of the target image and the latitude and longitude information are saved in a database, including: Convert the stitched and fused images from tif format to png or jpg format; Compress the png or jpg format image into a preset size while keeping the aspect ratio unchanged to obtain the target image; The target image is stored in a file server, and the download address of the target image and the latitude and longitude information are saved in a database.

4. The method for real-time fusion of aerial images and commercial maps in a broadband ad hoc network according to claim 1 is characterized in that: The terminals include computer terminals and mobile terminals; the terminals in the network are connected to the system through a broadband ad hoc network.

5. The method for real-time fusion of aerial images and commercial maps in a broadband ad hoc network according to claim 1 is characterized in that: The server notifies each terminal in the network to download and use the latest aerial image. After receiving the message, the terminal downloads the aerial image according to the download address provided by the server, and overlays the aerial image on a specified position on the map according to the latitude and longitude information of the aerial image, including: The server publishes the latitude and longitude information and the download address of the target image to the corresponding topic, and notifies each terminal in the network to download and use the latest aerial image; After receiving the message, the terminal subscribed to the topic downloads the aerial image according to the download address provided by the server, and obtains the latitude and longitude information of the aerial image according to the coordinate system of the map engine used by the terminal; The terminal overlays the aerial image on the specified position on the map based on the latitude and longitude information of the aerial image.

6. A device for real-time fusion of aerial images and commercial maps in a broadband ad hoc network, characterized in that: The device comprises: The aerial image transmission module is used to transmit the aerial images back to the server in real time through the broadband ad hoc network in places where the Internet cannot reach; the aerial images are pictures with coordinates, and the picture transmission process adopts the method of taking and transmitting at the same time; Aerial image fusion and coordinate calculation module, used for the server to perform splicing fusion and coordinate calculation on the received aerial images to obtain longitude and latitude information compatible with several map engines; A mosaic image format conversion and compression module is used to convert and compress the image obtained by mosaic fusion, store the obtained target image in a file server, and save the download address of the target image and the latitude and longitude information in a database; Aerial image and commercial map fusion module, the user's server notifies each terminal in the network to download and use the latest aerial image. After receiving the message, the terminal downloads the aerial image according to the download address provided by the server, and overlays the aerial image on the specified position on the map according to the latitude and longitude information of the aerial image.

7. The device for real-time fusion of aerial images and commercial maps in a broadband ad hoc network according to claim 6 is characterized in that: The aerial image fusion and coordinate calculation module is also used by the server to stitch and fuse the received aerial images to generate a panoramic image with longitude and latitude; the longitude and latitude information of the BD09, WGS84 and GCJ02 coordinate systems adapted to several map engines are calculated according to the projection coordinates of the panoramic image; The latitude and longitude information includes: the latitude and longitude of the upper left corner, the latitude and longitude of the lower left corner, the latitude and longitude of the upper right corner, and the latitude and longitude of the lower right corner; The panoramic image is an image in tif format.

8. The device for real-time fusion of aerial images and commercial maps in a broadband ad hoc network according to claim 6 is characterized in that: The image obtained by splicing and fusion is an image in tif format; the splicing image format conversion and compression module is also used to convert the image obtained by splicing and fusion from tif format to a picture in png format or jpg format; compress the picture in png format or jpg format into a preset size under the condition of keeping the aspect ratio unchanged to obtain a target picture; and store the target picture in a file server, and save the download address of the target picture and the latitude and longitude information in a database.

9. The device for real-time fusion of aerial images and commercial maps in a broadband ad hoc network according to claim 6, characterized in that: The terminals include computer terminals and mobile terminals; the terminals in the network are connected to the system through a broadband ad hoc network.

10. The device for real-time fusion of aerial images and commercial maps in a broadband ad hoc network according to claim 6, characterized in that: The aerial image and commercial map fusion module is also used for the server to publish the latitude and longitude information and the download address of the target image to the corresponding topic, and notify each terminal in the network to download and use the latest aerial image; after receiving the message, the terminal subscribed to the topic downloads the aerial image according to the download address provided by the server, and obtains the latitude and longitude information of the aerial image according to the coordinate system of the map engine used by the terminal; the terminal overlays the aerial image on the specified position on the map according to the latitude and longitude information of the aerial image.

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