Latest Contributions by ChrisDonohue__GISP

If the two images were in the same projection originally, and covered exactly the same extents, it may be possible to line them up by copying the World File from the working one and then renaming the copy to the file name of the non-working one.  For example, for a tif image, copy goodtif.tfw and rename it to the other rasters name (and keep the .tfw extension). Then open a brand new ArcMap session and load them both in.  Note that you definitely need to start a new session - the addition of a world file won't help for images already loaded into ArcGIS. However, the liklihood that the images are exactly the same is a longshot.  More likely Georeferencing will need to be employed to get the two aligned. One thing that would be helpful to know in terms of troubleshooting this is the raster file type of the imagery you have.  Are they tiffs, sids, jpg, or another of the many image formats?  This information is helpful to know as different rasters have different properties.  For example, some rasters also can have the extent embedded in the raster itself, which can override the world file. Chris Donohue, GISP ... View more

I think Iterate Row Selection will work for you.  Note that there is a setting to change that will do the sorting by County that is built into the tool already.  Here's what you do:  1. Click on the Iterate Row Selection tool in Modelbuilder. 2.  When the tool window opens, go to the "Group By Fields (optional)" pulldown and select the field that denotes your counties. 3.  Hit the Plus sign icon on the right to add it in. 4.  Hit OK.  Now the iterator will grab all the selected rows for each county. In regards to outputting this, I think a "Copy Features" tool will work.  Attach this to the right of the Iterator.  Use the "Selected Rows" that come off the Iterator as the input to "Copy Features". In regards to the output file names, if you want the county name included in the output, the "Value" from the Iterator (which will be county names) can be used as what they call an "in-line variable" to name the output.  Basically, in the file naming, one adds %Value% to the file name.  Each time the iterator runs and a file is made, the part with %Value% gets the County name.   This is very handy for keeping the files organized. Here's some information on that. http://resources.arcgis.com/en/help/main/10.2/index.html#/Examples_of_inline_model_variable_substitution/002w0000005w000000/ Chris Donohue, GISP ... View more