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CAD 在openlayers 中实现思路
source link: https://blog.51cto.com/tp101/5753774
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CAD 在openlayers 中实现思路
精选 原创CAD DWG文件属于加密文件没有过多的去研究
CAD DXF文件属于文本型文件
OPENLAYERS 可以加载GEOJSON文件
DXF -- GEOJSON （文件过大时加载浏览器崩溃）-- 导入数据库-- 根据zoom级别抽稀压缩传输 -- 浏览器端还原 GEOJSON
DXF 2 GEOJSON
import os
from osgeo import osr, ogr, gdal
def dxf_to_geojson(dxf):
basename = os.path.split(dxf)[0]
filename = os.path.basename(dxf).split('.')[0]
outfile = "{}.json".format(basename + filename)
print(outfile)
ogr.RegisterAll()
gdal.SetConfigOption("GDAL_FILENAME_IS_UTF8", "YES")
gdal.SetConfigOption("SHAPE_ENCODING", "")
gdal.SetConfigOption("DXF_ENCODING", "ASCII") # 设置DXF缺省编码
poDS = ogr.Open(dxf, False,)
poDriver = ogr.GetDriverByName("GeoJson")
# 保存文件 COORDINATE_PRECISION 坐标保留小数位数
options = ["WRITE_NAME=NO","COORDINATE_PRECISION=3","ID_GENERATE=NO"];
res = poDriver.CopyDataSource(poDS, outfile,options)
if __name__ == '__main__':
dxf_to_geojson('test.dxf')
from osgeo import osr, ogr, gdal
def dxf_to_geojson(dxf):
basename = os.path.split(dxf)[0]
filename = os.path.basename(dxf).split('.')[0]
outfile = "{}.json".format(basename + filename)
print(outfile)
ogr.RegisterAll()
gdal.SetConfigOption("GDAL_FILENAME_IS_UTF8", "YES")
gdal.SetConfigOption("SHAPE_ENCODING", "")
gdal.SetConfigOption("DXF_ENCODING", "ASCII") # 设置DXF缺省编码
poDS = ogr.Open(dxf, False,)
poDriver = ogr.GetDriverByName("GeoJson")
# 保存文件 COORDINATE_PRECISION 坐标保留小数位数
options = ["WRITE_NAME=NO","COORDINATE_PRECISION=3","ID_GENERATE=NO"];
res = poDriver.CopyDataSource(poDS, outfile,options)
if __name__ == '__main__':
dxf_to_geojson('test.dxf')
GEOJSON 导入数据库
使用ijson 读取GEOJSON 入库 进行中。。。
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