topic Extents....... in Geoprocessing Questions

Extents.......

JamesReed1 — Mon, 25 Feb 2013 14:57:24 GMT

How do you figure the extents of a frame? I am trying to create a "Fishnet" and I need to know the extents (Top, Bottom, Right, and Left). Do I activate the frame into workspace and pick a points or is there a better way. I apologize for such a crazy question, but I am self-taught and there are things I just don't know and can't seem to find any information on.

Re: How to get the current data frame extent values

curtvprice — Sat, 11 Dec 2021 12:09:12 GMT

Not a crazy question!

You can get these extent numbers a couple of ways:

From the ArcMap menu:

Geoprocessing > Environments > Extent

Same as Display

The following Python code, pasted into the Python command window, will also get these numbers for you.

import arcpy.mapping
mxd = arcpy.mapping.MapDocument("CURRENT")
print mxd.activeDataFrame.extent

If you need to automate this process, you can, using ModelBuider.

Re: Extents.......

JamesReed1 — Mon, 25 Feb 2013 18:59:26 GMT

Thanks you, I got the extent numbers I needed. I guess I should try to explain what I am trying to do. I have created a grid with a data frame. The grid is for a specific area and the blocks are a certain size, 20 across and 14 down. I have tried using Datadriven pages to create my grid, that didn't work. Now I am trying to use Fishnet to create my grid. I can get my grid the right size, but it won't come in at the same location as the "frame" grid. I am at a loss of what to do, I have tried different things. I have used the "Identify" tool at the bottom left hand corner of the frame to get my X and Y origin cooridinates.