Construction method of enhanced positioning transformation model of remote sensing image map data, enhanced positioning method and enhanced positioning server
A technology for enhancing positioning and transforming models, which is applied in the fields of image processing and map surveying and mapping. It can solve the problems of insufficient positioning accuracy, obstacles to popularization, and inability to widely apply satellite remote sensing map products, etc., to achieve the effect of improving positioning accuracy and low cost
Active Publication Date: 2020-12-15
遥聚信息服务上海有限公司
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Problems solved by technology
However, due to the lack of a large amount of high-precision basic geographic data in satellite image data processing units, the positioning of commercial remote sensing images is basically realized by uncontrolled positioning technology, resulting in insufficient positioning accuracy, and there is still a large room for improvement in some areas
[0004] In addition, the existing image positioning accuracy analysis and improvement methods are only for specific remote sensing images (such as Google Earth remote sensing images), and cannot be widely applied to other satellite remote sensing map products, hindering the promotion
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[0022] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may refer to the same or one or more of the different embodiments. Note that throughout the specification, the same reference numerals designate the same or similar elements, and unnecessary repeated descriptions are omitted. In addition, in a specific embodiment, an element appearing in a singular form does not exclude that it may appear in a plural (plural) form.
[0023] The term "dedicated positioning device" as used herein means a dedicated positioning device such as a real-time kinematic global navigation satellite system (RTKGNSS, also known as a carrier-phase differential global navigation and positioning system). It is designed to collect geographic data of the area of interest and obtain sub-meter or even centimeter or even millimeter-level positioning accuracy of geographic data. The positioning accuracy of the...
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The invention relates to a construction method of an enhanced positioning transformation model of remote sensing photomap data, an enhanced positioning method and an enhanced positioning server. The construction method comprises the steps that first map coordinates of control points in an interest area and actually measured coordinates of all the control points are obtained, and the precision of the actually measured coordinates is higher than that of the first map coordinates; a coordinate system of one of the first map coordinates and the actually measured coordinates is selected as a reference coordinate system; whether a coordinate system of the other coordinates is the same as the reference coordinate system or not is determined, and if not, the coordinate system of the other coordinates of all the control points is converted to the reference coordinate system; gauss projection forward transformation is conducted on the first map coordinates and the actually measured coordinates in the reference coordinate system of all the control points; and the enhanced positioning transformation model is constructed on the interest area based on the map coordinates and the actually measured coordinates, subjected to gauss projection forward transformation, of all the control points. According to the construction method, the positioning precision of various commercial remote sensing photomaps in all the local areas can be improved quickly at the low cost.
Description
technical field [0001] The invention relates to the fields of image processing and map surveying, in particular to a method for constructing an enhanced positioning transformation model for remote sensing image map data, an enhanced positioning method for remote sensing image map data, and an enhanced positioning server. Background technique [0002] The rapid development of aerospace remote sensing technology and mobile Internet technology has made Internet map services flourish. At present, there are many remote sensing image map service providers at home and abroad, which can provide browsing or downloading services for professional satellite remote sensing map products, typically, such as foreign Google Earth / Map, Microsoft Bing map; German map, Baidu map, etc. These map service providers have developed corresponding map service websites and application programs (APP), and provide secondary development interfaces to provide map services for developers in various applica...
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IPC IPC(8): G01C15/00
CPCG01C15/00
Inventor 陈天泽
Owner 遥聚信息服务上海有限公司