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Computerized generation method for sunlight normalized distribution image on rough ground

A technology of direct sunlight and computer, applied in the field of remote sensing and geographic information system

Inactive Publication Date: 2006-10-11
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing satellite remote sensing digital image processing and application technologies, such as orthophoto image processing technologies, have not fundamentally solved this important technical problem.

Method used

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  • Computerized generation method for sunlight normalized distribution image on rough ground
  • Computerized generation method for sunlight normalized distribution image on rough ground
  • Computerized generation method for sunlight normalized distribution image on rough ground

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Embodiment Construction

[0027] The following is based on Figure 1 ~ Figure 3 A preferred embodiment of the present invention is given and described in detail so as to better illustrate the features and functional characteristics of the present invention, rather than to limit the scope of the present invention.

[0028] see figure 1 , which shows the satellite telemetry digital topographic map of the Longyan area in Fujian Province, China to be studied in this embodiment.

[0029] please participate figure 2 , step 1000, start the computer-generated program 100 of this embodiment residing in the GIS geographic information system, step 1001, input such as figure 1 The digital topographic map of the region to be studied in this embodiment is shown, and the registration adjustment is performed to determine the grid. Step 1002, the first point (grid) on the digital topographic map is selected. Step 1003 calculates the sun elevation angle, the azimuth angle of each point on the digital topographic map...

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Abstract

The invention relates to a method for generating the graph of sunlight normalized distribution on concave-convex ground, by computer. It comprises: based on GIS, it uses the sun altitude angle / azimuth angle, the digital map (digital ground mode) and the geography coordinate (latitude and longitude) at each point, to use computer point-to-point calculate the sunlight ground irradiate factor at each point of digital map; at last, transforms the sunlight ground irradiate factor at each point into the sunlight distribution map. The inventive sun light distribution map can express the sunlight relative luminance at each point of natural ground that affected by the landform; it can be used in the landform effect correct of sunlight of remote sensing graph, the prediction of radar detecting effect, digital simulation, etc.

Description

technical field [0001] The invention relates to a remote sensing and geographic information system technology, in particular, it relates to using a digital topographic map to generate a computer-generated normalized distribution image of direct sunlight on undulating ground. Background technique [0002] Due to the shading and shielding of the direct sunlight by the terrain, the distribution of direct solar irradiance on the natural surface will change due to the terrain compared with the broad horizontal ground. Obviously, it also changes the comparability of remote sensing data of ground objects in horizontal ground imaging. Affects the quality of remote sensing digital images and the level of quantitative research and application. The influence of terrain on satellite remote sensing digital images and the elimination of mountain shadows and cloud shadows have always been difficult problems in the processing and application of satellite remote sensing digital images. The ...

Claims

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Application Information

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IPC IPC(8): G06F17/00G06T1/00G01S17/89
Inventor 李先华
Owner SHANGHAI UNIV
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