topic Re: Set Extent not working. in Python Questions

Set Extent not working.

DEAF_PROBERT_68 — Mon, 23 Feb 2015 18:56:47 GMT

I am trying to set the extent of the ArcMap where I want to add the raster to my ArcMap but this does not work...

#Set the Scale extent arcpy.Extent(147806,3495023,584371,3899368)

I have looked at the ArcGIS 10.1 help about this but not sure which one is the correct way to display them .

Re: Set Extent not working.

JakeSkinner — Mon, 23 Feb 2015 19:19:51 GMT

Hi Robert,

Arcpy.Extent is an environment variable for geoprocessing tools. See the following help:

Output Extent (Environment setting)—Help | ArcGIS for Desktop

To update the data frame extent, you will need to use DataFrame class.

Re: Set Extent not working.

DEAF_PROBERT_68 — Mon, 23 Feb 2015 20:43:40 GMT

Thank you.

Re: Set Extent not working.

DEAF_PROBERT_68 — Thu, 26 Feb 2015 16:28:53 GMT

Jake Skinner‌

I tried to set the extent numbers in UTM but it would not allow me to... even I set the df as well...

#Set the df to refresh the "Set Extent"

df = arcpy.mapping.ListDataFrames(mxd, "Layers")[0]

arcpy.env.extent ="MAXOF"

newExtent = df.extent

newExtent.XMin, newExtent.YMin = 210000,360000

newExtent.XMax, newExtent.YMax = 550000,400000

df.extent = newExtent

Re: Set Extent not working.

JakeSkinner — Thu, 26 Feb 2015 17:11:35 GMT

What coordinate system is your Data Frame set to? Also, are you executing this code in the Python window within ArcMap?

Re: Set Extent not working.

DEAF_PROBERT_68 — Thu, 26 Feb 2015 17:19:45 GMT

The imagery are set to NAD 1983 UTM Zone 13 N and the code I wrote are done in Pyscripter

Re: Set Extent not working.

JakeSkinner — Fri, 10 Dec 2021 22:50:38 GMT

Since you are running the code in PyScripter, the extent will not update. You can run the code within ArcMap using the Python window. Ex:

import arcpy

mxd = arcpy.mapping.MapDocument("CURRENT")

df = arcpy.mapping.ListDataFrames(mxd, "Layers")[0]
arcpy.env.extent ="MAXOF"
newExtent = df.extent
newExtent.XMin, newExtent.YMin =  210000,360000
newExtent.XMax, newExtent.YMax =  550000,400000
df.extent = newExtent

del mxd

You can update the extent in PyScripter, but you will need to save the MXD. Once you re-open the MXD, the map will be at the new extent. Ex:

import arcpy

mxd = arcpy.mapping.MapDocument(r"C:\data\vector\world\Countries.mxd")

df = arcpy.mapping.ListDataFrames(mxd, "Layers")[0]
arcpy.env.extent ="MAXOF"
newExtent = df.extent
newExtent.XMin, newExtent.YMin =  210000,360000
newExtent.XMax, newExtent.YMax =  550000,400000
df.extent = newExtent
mxd.save()

del mxd