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How to choose between data frame coordinate or data source coordianate to calculate geometry?

SaidAkif

I looked on the web for a way to calculate geometry ("shape.area@hectares!") with an easy way to choose between the data frame coordinate or data source coordiane to complete this thast with arcpy (python). Unfortunatly, I fourd something related to the use or the sursor (updateCursor).

is there an easy way to do so?

Thanks

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WesMiller

You may also be interested in this tool ArcGIS Help (10.2, 10.2.1, and 10.2.2)

WesMiller

Do you want to do it in python or do you want the tool that does it?

If you want to do it in python use the code above as a starting point pluck out some sample data and work through it.

If it's the tool follow the instructions above and you'll find it to be very easy.

SaidAkif

Thanks but I want to do exactly what you described in Python

WesMiller

Right click the field you want to calculate choose "Calculate Geometry" you'll find the choices your looking for there. The field must be Type "Double"

SaidAkif

Me too I did not test the code. But it is like this

SaidAkif

I just past rapidly when I see not easy (efficient procedure)

http//:gis.stackexchange.com/questions/73170

Thanks

WesMiller

I've not tested this code but are you talking about something like below?

mxd = arcpy.mapping.MapDocument("CURRENT")
df = arcpy.mapping.ListDataFrames(mxd)[0]
dfsr = df.spatialReference
for row in arcpy.da.UpdateCursor(fc, ["SHAPE@XY","Xfield","Yfield"],"",dfsr):
    row[1],row[2] = row[0]
    updateRow(row)

DarrenWiens2

Please post what you found so we have a starting point.

edit: I will assume you are looking for a way to use the field calculator (or Calculate Field tool) rather than learning how to use an Update Cursor. I'm guessing the reason Update Cursor works while field calculator does not, is that the field uses the CRS of the layer, while you can specify the CRS of an Update Cursor. I can't say whether simply specifying a different CRS in the Update Cursor will actually yield correct results, but you are free to change it nonetheless.

SaidAkif

I am looking for an alternative way to do it, more efficient or a way that I don't know

DarrenWiens2

Unfortunatly, I fourd something related to the use or the sursor (updateCursor).
is there an easy way to do so?

This is confusing. Did you find a solution using updateCursor that is too complicated and you're looking for a simpler solution? If so, post a link to the complicated solution, or better yet, the code itself. If not, please explain further what you are looking for.

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