I feel like there has to be a good way to do this in ArcGIS but can't seem to find it. I have well survey's that pinpoint well locations using the FSL (From southern line of section)/FWL (From western line of section) convention. These descriptions are essentially coordinate pairs but I can't seem to find a good way to accurately use them in ArcGIS. I can use the measure tool and get a good estimate, but I would love to have a way to specify the BLM section and then enter the FSL/FWL and pinpoint the well. Does anyone have any ideas of how to do this?
I was able to come up with an accurate means of achieving my desired results by creating a line FC with two features. One that follows the Southern line of the section polygon and another that follows the Western line of the section polygon. Using the offsets given by the survey, I put buffers around each line with the corresponding survey offsets and then was able to pinpoint my location based on the intersect of the buffers.
This may not be the quickest way to solve the problem, but if these coordinates are relative to the BLM section, you could place them at the BLM section and then move each point individually using basic editor tools in ArcMap (see: http://resources.arcgis.com/en/help/main/10.1/index.html#/relative_to_its_current_location_delta_x_y/01m80000002t000000/).
This could be done programmatically in ArcPy using the SHAPE@XY token that came with arcpy.da.UpdateCursor. See the answers to this question.