arcgis-10.0arcgis-desktopgpsssftrimble
I have not come across *.ssf files before but I believe they are a Trimble GPS binary format. Someone has asked me if these files which he thinks have line/poly features can be imported for display in ArcMap 10.0.
I am keen to know whether this is possible because my research so far seems to indicate that they are for correcting feature accuracy rather than containing features.
Can *.ssf files be converted for display in ArcMap?
Did you edit the data in that table at all? It's strange how there is one row with its lat/longs in DDMMSS when all the others (the ones that aren't blank) are in decimal degrees. Also, do the points which are missing positional data actually show up in ArcMap? Are they where they're supposed to be?
As far as the missing data, it looks like everything went fine during data collection on 2/4/2014, all those points have lat/longs, etc. But on 3/4, they don't. I suspect the Trimble is working fine but some other problem cropped up during data collection: too few satellites to get a location fix, for example, or maybe the field team didn't record enough points at each location to get a fix. You could export the file again, but modify the Export Setup to include the data's DOP values, Correction Status, and number of positions recorded to diagnose the problem.
ETA: In light of your comment that differential correction isn't working, I think that's probably the problem. If your export is set up to not export any uncorrected positions (which is the default setting, I think), and you weren't getting real-time corrections in the field on 3/4, then your features would export with no positions, and therefore no lat/long, precision, or height.
So I'd try to get differential correction working first. If it's not able to transfer base station files, you can try:
If you want to confirm that the lack of differential correction is the problem, you can change your Export Setup to include all positions when exporting. It's under the Position Filter tab in the Export Setup Properties:
I believe that with all those boxes checked, you should see lat/longs for all your points in the exported file. Of course, without differential correction, they will probably be a little further away from their actual location than the corrected points.
I see in your screenshots that QGIS show coordinates in Gaus Kruger 7 zone for Serbia (7 500 000, 4 900 000) and that is probably from your orthophoto background map. But you are trying to open shapefile which has WGS84 coordinates.
Turn on OTF (on-the-fly) CRS transformation in your project properties:
If you have proper transformation parameters for GK7 Serbian coordinate system it should be OK. If your Trimble station is adjusted to show Gaus Kruger coordinates on the display then take those parameters from Trimble device.
Best Answer
You can also write your ssf file to a shapefile directly in TerraSync on your mobile device. This shapefile can then be transferred from the device to your PC. The steps for doing this are as follows: