topic superimposing vector and raster data in Python Questions https://community.esri.com/t5/python-questions/superimposing-vector-and-raster-data/m-p/422004#M33162 <HTML><HEAD></HEAD><BODY><SPAN>I have created a Python code that uses: </SPAN><BR /><SPAN>a. a grid file of water depth values in a region (Every cell is 10x10 m) and </SPAN><BR /><SPAN>b. a polygon shapefile of land use information&nbsp; </SPAN><BR /><BR /><SPAN>Generally the code reads the depth values in every grid cell and according to the land use of each cell performs several calculations</SPAN><BR /><BR /><SPAN>And now here comes the problem:</SPAN><BR /><BR /><SPAN>At first I made the assumption that the land use found in the center of every grid cell represents the land use of the whole cell. </SPAN><BR /><BR /><SPAN>But I am wondering whether a big error takes place in cells which cover two different land use polygons.</SPAN><BR /><BR /><SPAN>Is it worthy to find a way to calculate the irregular areas that come up in those grid cells, which ???carry??? the same landuse information? Or I should only minimize the dimensions of every grid cell (to 5x5 for example), minimizing in this way the error?</SPAN><BR /><BR /><SPAN>Thank you very much for your time!</SPAN></BODY></HTML> Mon, 10 Dec 2012 10:40:47 GMT irinivozinaki 2012-12-10T10:40:47Z superimposing vector and raster data https://community.esri.com/t5/python-questions/superimposing-vector-and-raster-data/m-p/422004#M33162 <HTML><HEAD></HEAD><BODY><SPAN>I have created a Python code that uses: </SPAN><BR /><SPAN>a. a grid file of water depth values in a region (Every cell is 10x10 m) and </SPAN><BR /><SPAN>b. a polygon shapefile of land use information&nbsp; </SPAN><BR /><BR /><SPAN>Generally the code reads the depth values in every grid cell and according to the land use of each cell performs several calculations</SPAN><BR /><BR /><SPAN>And now here comes the problem:</SPAN><BR /><BR /><SPAN>At first I made the assumption that the land use found in the center of every grid cell represents the land use of the whole cell. </SPAN><BR /><BR /><SPAN>But I am wondering whether a big error takes place in cells which cover two different land use polygons.</SPAN><BR /><BR /><SPAN>Is it worthy to find a way to calculate the irregular areas that come up in those grid cells, which ???carry??? the same landuse information? Or I should only minimize the dimensions of every grid cell (to 5x5 for example), minimizing in this way the error?</SPAN><BR /><BR /><SPAN>Thank you very much for your time!</SPAN></BODY></HTML> Mon, 10 Dec 2012 10:40:47 GMT https://community.esri.com/t5/python-questions/superimposing-vector-and-raster-data/m-p/422004#M33162 irinivozinaki 2012-12-10T10:40:47Z