地图比例尺与分辨率的换算关系
def calculate_scale_from_resolution(resolution, server_type):
"""
通过分辨率，计算当前影像比例尺;
例如 resolution为0.6米，这表明图上1dpi表示实地0.6m;
1inch 96dpi 2.54厘米
:param resolution: 分辨率
:return: 比例尺
"""
if server_type == 'IServer_WMTS':
return 1 / (resolution * 90.714 / 2.54 * 100)
return 1 / (resolution * 96 / 2.54 * 100)
def calculate_resolution_from_scale(scale, server_type):
"""
通过比例尺，计算当前影像分辨率;
例如 scale为1：500，这表明图上1厘米表示实地5M;
1inch 96dpi 2.54厘米
:param scale:比例尺
:return:分辨率
"""
if server_type == 'IServer_WMTS':
return round(((1 / scale) / 100) * 2.54 / 90.714, 3)
return round(((1 / scale) / 100) * 2.54 / 96, 3)
if __name__=="__main__":
print(calculate_resolution_from_scale(1/3800,'WMTS')) #1M
scale=calculate_scale_from_resolution(1,'WMTS')
print(1/scale)
地图瓦片切片方案
SuperMap 切片文件
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EPSG带号查询
WGS84的EPSG带号为4326
- http://epsg.io/4326
CGCS2000的EPSG带号为4490 - https://epsg.io/4490
