Hi everyone, (system is 9.3.1)I am trying to create a script that takes in LiDAR, .las files, calculates the heights from the ground, and returns point files of user defined height categories. If you guys need it I can post the whole code, but its fairly long. The Idea is that the user types in a list of strings, for example low med and high, and then defines those heights as say less than 5, between 5 and 10 and above 10, and then gets three point files out, corresponding to each height category. This is the part of the code that is failing: Note: name_of_hights = 'low med high'.split()# Make a layer from the feature class
gp.MakeFeatureLayer("test.gdb\\raster_height_point","lyr")
counter = 0
while counter < len(name_of_hights):
cat_name = str(name_of_hights[counter])
gp.SelectLayerByAttribute("lyr", "NEW_SELECTION", " ' " + cat + " ' = ' " + cat_name + " ' ")
# Write the selected features to a new featureclass
path1="test.gdb\\raster_height_point_"
path2=name_of_hights[counter]
path=path1+path2
gp.CopyFeatures("lyr", path)
print(cat_name)
counter=counter+1
It will fail with this:Executing: MakeFeatureLayer test.gdb\raster_height_point lyr1 # # "POINTID POINTID VISIBLE NONE;GRID_CODE GRID_CODE VISIBLE NONE;cat cat VISIBLE NONE"Start Time: Mon May 14 14:05:59 2012Executed (MakeFeatureLayer) successfully.End Time: Mon May 14 14:06:00 2012 (Elapsed Time: 1.00 seconds)If I do this #gp.MakeFeatureLayer("test.gdb\\raster_height_point","lyr") then it will run, however it will not ever complete the loop, it never runs print(cat_name) at the end of the loop. If I have gp.MakeFeatureLayer("test.gdb\\raster_height_point","lyr") and #gp.SelectLayerByAttribute("lyr", "NEW_SELECTION", " ' " + cat + " ' = ' " + cat_name + " ' ") then the loop runs through and prints fine. If I replace the loop with if statements and have gp.SelectLayerByAttribute("lyr", "NEW_SELECTION", " cat = low ") etc it works fine, makes the point files and everything. cat is a category in the attributes table which has already been defined, as low med or high. But because the number of categories needs to change I cant do it with if statements.does anyone have any ideas as to what I have got wrong in here?Thanks for any help you can give me
