Latest Contributions by YuzhenLi

I was trying to combine many feature classes from one geodatabase into one feature class. All input feature classes have the same schema and all features are line and have the same attributes. The total number of line features is big (~ half million). I noticed quite a bit of features are missing after merging/appending. I tried both scripting (arcpy merge_management and append_management function) and using merge and append tool in ArcToolBox, I even tried to repair geometry first before merge, define extent before merge..,none of these seem to fix the issue. When I changed the computer, the missing issue still existed, just the number of missing features are different. Any suggestion or did anyone here experience this before? Did I miss anything when using merge/append? Thanks. ... View more

I have over a hundred csv files with point x,y location and attributes covering a large area. I need to create polygons (circles) based on these points location and their attribute. I need to do it in the batch mode. I tried to reformat the files to GENERATE input file format, then use arcpy.Ascii3DToFeatureClass_3d to create point feature class, but the problem is after converting to point shape file, all the attributes for these points were lost. There is only id column in attribute table of the point shape file. So I can not do buffer to get the circles. Can anyone help on this? Is arcpy.Ascii3DToFeatureClass_3d the correct function for me to use? I am using ArcGis 10.1 and new to python script. Thank you very much. Lee ... View more