Web映射应用程序中流行的平铺网格和网格API
gatilegrid的Python项目详细描述
gatilegrid
用于Web映射应用程序的Geoadmin自定义磁贴网格
gatilegrid与python 2.7、3.5和3.6兼容
安装
$ pip install gatilegrid
使用量
支撑着几个瓦栅，即21781、2056、3857和4326。这是一个使用21781的例子。
对于4326，可以使用一个附加参数（tmsCompatible=True）。
fromgatilegridimportgetTileGridfromgatilegridimportGeoadminTileGridLV03asGeoadminTileGridzoom=18tileCol=6tileRow=7# Get and initialize the grid (top-left and bottom-left are availble)gagrid=getTileGrid(21781)(originCorner='top-left')# With extent constraintoffset=100000gagridExtent=GeoadminTileGrid(extent=[gagrid.MINX+offset,gagrid.MINY+offset,gagrid.MAXX-offset,gagrid.MAXY-offset])bounds=[xmin,ymin,xmax,ymax]=gagrid.tileBounds(zoom,tileCol,tileRow)print(bounds)>>>[496800.0,247600.0,509600.0,260400.0]print(gagrid.tileAddressTemplate)>>>{zoom}/{tileCol}/{tileRow}topLeftCorner=[xmin,ymax]tileAddress=[tileCol,tileRow]=gagrid.tileAddress(zoom,topLeftCorner)print(tileAddress)>>>[6,7]# Get the parent tilesparentZoom=1gagrid.getParentTiles(zoom,tileCol,tileRow,parentZoom)>>>[[1,0,0]]# It also works if the point is within the tilepointInTile=[topLeftCorner[0]+200.0,topLeftCorner[1]-200.0]print(gagrid.tileAddress(zoom,pointInTile))>>>[7,6]# Resolution in metersprint(gagrid.getResolution(zoom))>>>50.0# Scale dpi dependent (defaults to 96)print(gagrid.getScale(zoom,dpi=96.0))>>>188976.0# Tile size in metersprint(gagrid.tileSize(zoom))>>>12800.0# Number of tiles at zoomprint(gagrid.numberOfTilesAtZoom(zoom))>>>950# Extent dependentprint(gagridExtent.numberOfTilesAtZoom(zoom))>>>253# Get the closest zoom for a given resolutionprint(gagrid.getClosestZoom(245))>>>16# Get the ceiling zoom for a given resolutionprint(gagrid.getCeilingZoom(245))>>>17# Generate tilesSpecminZoom=16maxZoom=zoomtilesSpecGenerator=gagrid.iterGrid(minZoom,maxZoom)fori,tinenumerate(tilesSpecGenerator):(tileBounds,zoom,tileCol,tileRow)=tprint(t)ifi==1:break>>>([420000.0,286000.0,484000.0,350000.0],16,0,0)>>>([484000.0,286000.0,548000.0,350000.0],16,1,0)# Extent dependenttilesSpecGeneratorExtent=gagridExtent.iterGrid(minZoom,maxZoom)fori,tinenumerate(tilesSpecGeneratorExtent):(tileBounds,zoom,tileCol,tileRow)=tprint(t)ifi=1:break>>>([484000.0,222000.0,548000.0,286000.0],16,1,1)>>>([548000.0,222000.0,612000.0,286000.0],16,2,1)
该模块还为网格单元寻址提供了一个简单的网格api。
fromgatilegridimportGridextent=[485349.96,75250.055,833849.959,295950.054]resolutionX=100.0resolutionY=-100.0grid=Grid(extent,resolutionX,resolutionY)# We use singed resolution to define the origin.# Here the origin is at the top-left corner.print(grid.origin)>>>[485349.96,295950.054]# The Grid class defines a series of useful propertiesprint(grid.cellArea)>>>10000.0print(grid.nbCellsX)>>>3485print(grid.nbCellsY)>>>2207print(grid.isTopLeft)>>>Trueprint(grid.isBottomRight)>>>False[col,row]=grid.cellAddressFromPointCoordinate([500000,100000])print(col)>>>146print(row)>>>1959# Get the extent of the cell using its addresscellExtent=grid.cellExtent(col,row)print(cellExtent)>>>[499949.96,99950.054,500049.96,100050.054]# Get an address range using an extent[minCol,minRow,maxCol,maxRow]=grid.getExtentAddress([500000,100000,550000,150000])print(minCol)>>>146print(minRow)>>>1459print(maxCol)>>>646print(maxRow)>>>1959
测试
source .venv/bin/activate
python setup.py test
发布模块的新版本
编辑$HOME/.pypirc并添加（keepass中的用户名和密码）：
[distutils]
index-servers =
pypi
pypitest
[pypi]
repository=https://upload.pypi.org/legacy/
username=iwi***
password=
[pypitest]
repository=https://test.pypi.org/legacy/
username=iwi***
password=
setup.py中的凹凸版本。
生成、检查新模块并将其上载到测试存储库：
pip install --upgrade twine wheel setuptools
python setup.py sdist bdist_wheel
twine upload --repository testpypi dist/*
从测试存储库测试本地安装。
pip install -i https://test.pypi.org/simple/ gatilegrid
如果一切正常，将新版本推送到默认存储库。
twine upload --repository pypi dist/*
测试新创建的模块。
在github中创建一个版本。
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