Latest Contributions by MelitaKennedy

Technical Support and I have made contact and I've asked them to talk to the raster team about what's happening so I don't need your incident or customer #. Melita ... View more

I am sorry about the confusion, and the confusing answers you've received.  My name is Melita Kennedy. I'm a product engineer who works on the Esri projection engine team. We (Esri) haven't fully implemented the WKT2 standard. The "WKT1" standard didn't mandate names of objects so every company basically has their own. Esri's version, which predates the WKT1 standard, is old enough that we have a lot of Esri-specific names that don't match the EPSG dataset although we do some aliasing/synonyms to try to support alternative names.  *I* say that we follow EPSG data, not that we fully support it, because I know of all the gotchas and different names, etc. There's no way we should be interpreting something that has Mercator in the name of the map projection as a stereographic projection! Yes, the data's rotated. That's a completely wrong definition.  Raster data follows a slightly different path when handling coordinate systems than vector data does which complicates matters a bit.  I'm going to send a note to a contact in technical support because I think I know who wrote that response. She may be able to find the incident number. Irregardless, would you send your incident number, if you were given one and/or your customer number to me via email. mkennedy at esri dot com Melita ... View more

I don't know where the link would have been, but here's the contents of the file:  PROJCS["ETRS_1989_UTM_Zone_32N_8stellen",GEOGCS["GCS_ETRS_1989",DATUM["D_ETRS_1989",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",32500000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",9.0],PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_Of_Origin",0.0],UNIT["Meter",1.0],AUTHORITY["Esri",102329]] ... View more

Hi Craig,  I have bad news, I'm afraid. We don't have the Australian geoid models in the software yet including the current releases, ArcGIS Pro 2.5 and Desktop 10.8.0. I hope to get them in very soon.  I know some people have taken an ASCII version of a geoid or other vertical transformation file and converted it into a raster and then used that to calculate the offsets.  Melita ... View more

If these were collected by time, I would expect more while waiting at stop lights/signs and then turning. Less points mid-block when the vehicle was going faster. Edit: If you label by ID or Sample ID, are the points progressing towards a corner, then turning? ... View more

Please list the coordinate systems of this map, the footprints layer and the basemap. Do the other maps use the same coordinate system? If the geographic coordinate systems are different between the map and the layers, what geographic/datum transformations are being used? Is it the same one in all the maps? ... View more

EPSG is planning to add the Local projection to its registry. I've been slowly, very slowly writing up the mathematics so that it can be published in the 7-2 Guidance Note. I'm hoping to finish it up over the holidays. Melita ... View more

I'm sorry that I didn't respond sooner. Is the NAD83 data really in the original 1986 version? If so, is it using EPSG:4269 or projected coordinate systems that are based on 4269?  You could use 108190 which approximates the difference between WGS84 at ITRF00 and NAD83. It converts to 4269, but is to CORS96 realization than the original NAD83. At the time we added this transformation, we didn't have a specific CORS96 definition in the software. Depending on when your state (if your data is in a single state), there's an equivalent transformation that converts to NAD83 HARN which may be similar to CORS96. So you might try converting to NAD83, but via the WGS_1984_(ITRF00)_To_NAD_1983_HARN + NAD_1983_To_HARN_XX where XX is the state abbreviation.  Melita ... View more

There's nothing already defined. What will you be doing with the data? Any analyses? What kind? Display only? Etc. Melita ... View more

Can you post a sample row from the table here? If not, can you send me a sample via email? mkennedy at esri dot com ... View more

What do you mean by "geoprocessing"? Which tool are you using? If you're using Add XY Data in ArcMap, what coordinate system are you assigning to the xy data? If it's latitude-longitude values, you need to define that geographic coordinate system. Also are you assigning the correct column to latitude etc.? ... View more

Hi Alicia,  I found a transformation in a pdf but it looks like it converts between ITRF2005 @2003.75 to SWEREF99. The parameters are: TX = 0.033750 TY = 0.029875 TZ = -0.080450 D [ppb] = 0.78  RX [0.001”] =  -2.134 RY [0.001”] = -7.765 RZ [0.001”] = 9.810 and using the coordinate frame method. There's another pdf file that discussion transformations between ITRF2014 and various other frames. It looks like Table 4 has the values to convert between ITRF2014 and SWEREF99, at least for southern Sweden. Because the document states that it's for maritime applications, the transformation may really be good for offshore areas only. Melita ... View more

The lines are the geodesic lines--the shortest path on the ellipsoid, so more like what an airplane would fly. If you want lines that are direct in that projected coordsys you're using, you need to build planar lines. You may need to project the source/target points to that projected coordsys. ... View more