If i have the extents for a layer how do i get ArcGIS to center the drawing

RickHawkins

I have the following code:

import arcpy

#mxd = arcpy.mapping.MapDocument("CURRENT")
mxd = arcpy.mapping.MapDocument(r"C:/GISMAPS/LUS Map.mxd")
df = arcpy.mapping.ListDataFrames(mxd)[0]
OHLayer = arcpy.mapping.ListLayers(mxd, "Primary OH", df)[0]

df.extent = OHLayer.getSelectedExtent(False)
#df.scale = df.scale * 1.1
extent = ({df.extent.XMin}, {df.extent.YMin}, {df.extent.XMax}, {df.extent.YMax})

print('XMin: {}, YMin: {}'.format(df.extent.XMin, df.extent.YMin))
print('XMax: {}, YMax: {}'.format(df.extent.XMax, df.extent.YMax))

arcpy.RefreshActiveView()
del mxd<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

This is the output for lines 12 and 13

How do i center this drawing so that section of map is displayed on the screen? I have the extents but do not know how to use them to do this.

Thanks for any help.

JoshuaBixby

The df.extent shows just that, the extent of the data frame itself regardless of what data layers are loaded and what data is selected.  That said, df.extent is also writable, so you can set the property to change the extent of the dataframe.  This is why I said Line 08 of your earlier code should both center and zoom the dataframe to the selected feature in the layer.