Latest Contributions by EricJohnson

We have some as builts in the DWG format. I open them in Autodesk DWG TrueView and use the 'Locate Point' tool to get the XY values for a point. Then I go to ArcMap, create my point using and input those XY values. The catch is, the Y value needs 10,000,000 added to it. When I do that, the point lines up perfectly to what I have on the aerial or have GPS'd.I have a feeling that if I can just shift that data up by 10,000,000ft, it is going to line up well and save me a lot of time. Their data uses the HARN state plane, we use the standard state plane for our area. When I reproject after using the CAD to geodatabase tool, I can't find any option to add 10,000,000 to the northing. Any ideas? -Dan ... View more

This is probably a silly question, but how would I set things up to record estimated accuracy, or PDOP or other data regarding the quality of my position collection when collecting features? I use Arcpad 10 with Trimble Positions. In the past, we used GPS Correct, and I had it set up to log best and worst estimated accuracy, but sadly enough I don't remember how I did that. I find the information useful for a couple of reasons, one it lets me easily go through attribute tables to see which features have been located by GPS vs just drawn in from old mapbooks, and also which of those may need to be gone back to and re-GPS'd. For a number of the features, such as valves and hydrants we use forms we created in Studio. Eric ... View more

We have made the switch from GPS Correct to Positions, but cannot in any way shape or form get it to check in data. Been working with Trimble to try to get a solution, but I haven't been able to find anyone else who is successfully using it to see if we can figure out what is going on. We have upgraded to Win 7, have all drivers etc. up to date, are running Arc Basic 10.1, Arcpad 10, and are collecting data with a GeoXH. The error we get says that we can't chek in because the .axf file is in use by another process, even when there is nothing else running: See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box. ************** Exception Text ************** System.IO.IOException: The process cannot access the file 'S:\Gis\GeoXH Data\Check In\Sewer_2-25\KGID_Sewers_gps_mdb.axf' because it is being used by another process.    at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)    at System.IO.File.InternalCopy(String sourceFileName, String destFileName, Boolean overwrite) There is much more to the error message, but I am wondering if anyone else has fought through this? Eric ... View more

Not sure if this is the correct forum for this question. We are beginning to build a GIS for a smallish combined utility system (water sewer roads stormwater) with several hundred each ov valves, manholes, etc. We are collecting data with a Trimble GeoXH, but have noticed that even after differential correction, the results are a bit off (up to 3 feet) when laid over a recent georeferenced aerial.  We can't see everything on the aerial, or we would use just that to build from, but we are trying to get the best accuracy and precision for our points. So I am trying to figure out my best next step: if I move the points to the apparent correct locations on the map, I get a warning about losing the GPS data, and it asks about rebuilding, which puts the point back where it started. I guess I could try a hybrid approach and not GPS the points I can see, but that could get confusing. Any ideas for a workflow for this? Eric Johnson ... View more