Extents.......

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02-25-2013 06:57 AM
JamesReed1
Occasional Contributor
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.
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curtvprice
MVP Esteemed Contributor
Not a crazy question!

You can get these extent numbers a couple of ways:


  1. From the ArcMap menu:


  2. Geoprocessing > Environments > Extent and choosing Same as Display -- you'll see the numbers populate and you can then copy and paste them into the Create Fishnet tool.
    [noparse][/noparse]

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


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


If you need to automate this process, you can, using ModelBuider.
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JamesReed1
Occasional Contributor
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.
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