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I'm new to GIS.
I have a raster that specifies the geographical distribution of temperature. I would like to find the temperature that is closest to a particular set of coordinates. How do a find the raster value nearest to [x, y]?
I'm using ArcGIS Desktop.
I have numerous points specified by longitude and latitude in a table that was imported using
Add X-Y Data... from an Excel spreadsheet. These points plot in the correct places on my map. Nevertheless, the points do not necessarily coincide with data in the raster, so when I do an
Extract Values to Points I get some -9999 values. Instead, I'd like to know the value of the nearest point where there is data. The output format doesn't really matter, but a column appended to the original table would be ideal. As far as extensions go, I think I have them all, but I can't say for certain.