Author: CSDN @ _Yakult_
In the fields of remote sensing science and geographic information systems (GIS), coordinate conversion is an important task, especially when you need to perform data analysis and visualization between different coordinate systems. Google Earth Engine (GEE) is a powerful cloud platform that provides many tools for processing remote sensing images and geospatial data. This blog will introduce how to use GEE for remote sensing image coordinate conversion and why this is so important in geographic information analysis. And take the example of converting a polygon area from the WGS84 geographical coordinate system to the UTM projected coordinate system.
Article directory
1. Coordinate conversion
Coordinate transformation is the process of converting geographic coordinates from one coordinate system (such as latitude and longitude) to another coordinate system (such as projected coordinates). This process involves converting between different map projections, as well as taking into account factors such as the ellipsoid model and the curvature of the Earth. Why is such a complicated conversion needed? Because the Earth is a three-dimensional ellipsoid and our maps are usually plane projections, points on the Earth need to be mapped onto the plane.
2. Detailed explanation of code
// 澳大利亚的坐标
var jsonPoly