DEM data color matching and drawing method and device

A data and color matching technology, applied in the field of DEM data map production, can solve problems such as poor user experience and unsightly DEM data mapping, and achieve the effect of improving experience, avoiding color confusion, and enhancing visual effects.

Inactive Publication Date: 2014-01-29
浙江数维科技有限公司
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Problems solved by technology

Although this method can realize the expression of DEM data through its general DEM data color matching function, this random assignment and color matching makes the drawing of DEM data unsightly and the user experience is poor

Method used

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  • DEM data color matching and drawing method and device

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Embodiment Construction

[0011] The present invention will be described in further detail below through specific implementation examples and in conjunction with the accompanying drawings.

[0012] The embodiment of the present invention performs automatic color matching on DEM data based on the HSV (Hue, Saturation, Value, Hue, Saturation, Value) color wheel, and is applicable to DEM data worldwide. The following is described by way of examples.

[0013] see figure 1 The flow chart of the color matching and mapping method of the shown DEM data, the method comprises the following steps:

[0014] Step S102, obtaining the elevation value of each pixel point in the DEM data one by one;

[0015] Step S104, determine the h value, s value and v value of the current pixel point according to the elevation value of the current pixel point and the corresponding relationship between the preset elevation value and the HSV color wheel; wherein, the preset elevation value and the HSV color wheel The corresponding...

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Abstract

The invention provides a DEM data color matching and drawing method and device. The method comprises the steps of acquiring the elevation values of all pixel points in DEM data, determining an h value, an s value and a v value of the current pixel point according to the correspondence between the elevation value and the preset elevation value of the current pixel point and an HSV color wheel, calculating a red R value, a green G value and a blue B value of a RGB color model of the current pixel point according to the determined h value, the determined s value and the determined v value, using the calculated R value, the calculated G value and the calculated B value as the color matching values of the current pixel point and drawing the DEM data according to the color matching values of each pixel point. By means of the DEM data color matching and drawing method and device, a drawing vision effect is enhanced, and user experience is improved.

Description

technical field [0001] The invention relates to the field of DEM data map making, in particular to a method and device for color matching and drawing of DEM data. Background technique [0002] At present, extensive research has been carried out on the expression of DEM (Digital Elevation Model, Digital Elevation Model) at home and abroad. Among them, the main focus is on the multi-scale expression of general DEM data and the comprehensive mapping of regional DEM data. The color matching of DEM data is The basis of DEM data representation. Currently, the color matching of DEM data usually uses Geographic Information System (GIS) software for computer-aided cartography. Among them, the expression function of DEM data has become a standard function module of GIS software. [0003] At present, the methods commonly used by GIS software include: first, use the histogram statistical method to classify the elevation values ​​of DEM data; then, randomly assign values ​​to the classi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/05
Inventor 楼宇封宁
Owner 浙江数维科技有限公司
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