Creating a wind zone polygons from a table

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10-06-2015 07:39 AM
ScottLouque
New Contributor III

I have an excel spreadsheet showing different wind speeds for a location based off of zip codes. I want to try to create polygons to represent each windspeed for each location. How can this be done in ArcMap? The table only includes Zip Codes and Windspeed

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16 Replies
ScottLouque
New Contributor III

I figured it out! The first char in one of my columns was a blank space.

DanPatterson_Retired
MVP Emeritus

grief...the unseen is often the worst offender

ScottLouque
New Contributor III

That solves the joining of the fields problem. But I am still left with trying to create a polygon from the fields I just joined. Is there a way to do this? I don't know if this can be done

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DanPatterson_Retired
MVP Emeritus

Are you having to go back to making a map?  I presume that the layer you joined the file to has the necessary geometry?! If so, then What is a layer?—Help | ArcGIS for Desktop  would be a good starting point.

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ScottLouque
New Contributor III

The wind table I joined is just a flat table I found on the Internet, it has no field for geometry. I guess I was under the impression that once I joined the fields, it would just use the geometry from the zip code polygon feature to calculate a wind zone feature.

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MitchHolley1
MVP Regular Contributor

You shouldn't have to create a polygon layer. 

There are zipcode boundary files already created by the CENSUS bureau.  If you do not already have a layer, what did you join the 'windspeed' attribute table to?

What you need to do is symbolize each zip code by wind speed.

Layer Properties--> Symbology -->  Categories --> choose the 'WindSpeed' field

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ScottLouque
New Contributor III

Thank you Mitch, what you are saying may work. I was try to join the zip code feature to the wind speed table.

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