topic Re: GridIndexFeatures - syntax error in Python Questions

GridIndexFeatures - syntax error

nimitz — Fri, 07 Dec 2012 14:35:02 GMT

Hi all,
I am trying to create a grid with this GridIndexFeatures tool. I keep getting a syntax error on the parameter for the "polygonWidth" and "polygonHeight".
I'm doing this in IDLE: here is what I got so far:

###script for the intersection of the 2 shapefiles ###  ###import the basic mods for the geoprocessor  import arcpy, sys, os, traceback, math, string  ###set up the workspace you're going to work in  from arcpy import env  arcpy.env.workspace = "C:\GIS_Data\PGE_MLPP\intergrid.shp"  #set local variable outFeatureClass = "intersection" inFeatures = "NonAOC" polygonWidth = "528 feet" polygonHeight = "528 feet"  ###Execute the Grid  arcpy.GridIndexFeatures_cartography(outFeatureClass, inFeatures, "", "", "",                                     polygonWidth, polygonHeight)  ###Print print "Done"

Here is the error:

Traceback (most recent call last):
File "C:/Users/RLong/Documents/intersect1", line 23, in <module>
polygonWidth, polygonHeight)
File "C:\Program Files\ArcGIS\Desktop10.0\arcpy\arcpy\cartography.py", line 787, in GridIndexFeatures
raise e
ExecuteError: Failed to execute. Parameters are not valid.
ERROR 000732: Input Features: Dataset NonAOC does not exist or is not supported
ERROR 000398: Value must be positive
ERROR 000398: Value must be positive
ERROR 000892: The numeric value is outside of the valid range.
ERROR 000892: The numeric value is outside of the valid range.
Failed to execute (GridIndexFeatures).

I've done this script (and variants of it) several times, but SINCE I'VE INSTALLED SP5 this is happening. just sayin...

Any help is apprecieated.

Re: GridIndexFeatures - syntax error

T__WayneWhitley — Fri, 07 Dec 2012 15:24:16 GMT

Your workspace setting doesn't look right - it is set to your shapefile in the sample code you posted...

Re: GridIndexFeatures - syntax error

nimitz — Fri, 07 Dec 2012 15:26:45 GMT

Your workspace setting doesn't look right - it is set to your shapefile in the sample code you posted...

Bear with me, but should I just truncate the file path? I want to place the resultant grid in the directory...

Thx,

oops...I just tried to truncate the file path and "EOL -String Literal error popped up"

Maybe I should set up a GEODB and do it that way? It seems like I can have a safe workspace in the GEODB.

Re: GridIndexFeatures - syntax error

T__WayneWhitley — Fri, 07 Dec 2012 15:30:56 GMT

It can be the root, say (if that folder exists):

env.workspace = r"C:\GIS_Data\PGE_MLPP"

...or you can designate, say for example, a file gdb (if it exists as well):

env.workspace = r"C:\GIS_Data\PGE_MLPP\stage.gdb"

EDIT: Just one more thing, what is 'intergrid.shp'? When you set the workspace, remember that is where inputs will be read, and outputs will be written - unless otherwise specified. In other words, your script will look for inFeatures from your workspace and write the result, intersection, there --- which I note, if your workspace is set to a folder, you need to specify a shapefile, intersection.shp.

Re: GridIndexFeatures - syntax error

nimitz — Fri, 07 Dec 2012 15:37:41 GMT

Thanks Wayne. I tried the root folder and that error has stopped, HOWEVER, the original error about the "polygonWidth" and "polygonHeight" is still coming up

File "C:/Users/RLong/Documents/intersect1", line 23, in <module>
polygonWidth, polygonHeight)

I don't get it. Should the "intersect1" be the resultant file? I did not create it.

Re: GridIndexFeatures - syntax error

T__WayneWhitley — Fri, 07 Dec 2012 15:41:15 GMT

Yes I saw that too... try specifying the output file with the '.shp' extension. If you're still having problems, post your code again.

...and what is 'NonAOC' - your input will come from your workspace as well, shouldn't it have a '.shp' file extension too? Does it exist? If you're intent is to pull inputs from elsewhere, then you need to specify that.

Re: GridIndexFeatures - syntax error

nimitz — Fri, 07 Dec 2012 16:05:24 GMT

Wayne,
You're right, I had to put the ".shp" extension.

Worked like a charm...

Many thanks and 1,000 karma points for you!

Re: GridIndexFeatures - syntax error

T__WayneWhitley — Fri, 07 Dec 2012 16:48:14 GMT

That's great...
Have a good weekend!

-Wayne