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This article mainly shows you "how to draw a grid according to distance in GIS development", the content is easy to understand, clear, hope to help you solve doubts, the following let the editor lead you to study and learn "how to draw a grid according to distance in GIS development" this article.

In the coordinate system of longitude and latitude, a series of grids are drawn according to the unit of length, which needs to calculate the distance according to longitude and latitude, and then generate new coordinates, which needs to be calculated and converted step by step according to the quantity. Therefore, in the division of some grids, the longitude and latitude are converted into plane coordinate systems to calculate, and the calculated coordinate units are metric, and then subtract according to the distance difference of the grid.

The most commonly used reference conversion coordinate system is the Lambert coordinate system, abbreviated as lcc. The coordinate system parameters in proj only need to set the latitude and longitude of the center and the latitude range of the data to improve the accuracy of data conversion.

When drawing these calculated grids on the longitude and latitude map, it is necessary to calculate the horizontal and vertical coordinates of each corner, so that there is no effect of intersection between the grids.

Use proj4 to achieve the coordinate transformation, view the relevant source code of proj4, and also put forward a simple mathematical function calculation.

The above is all the content of the article "how to draw a grid according to distance in GIS development". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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