Latest Contributions by MelitaKennedy

Hi Joel,  Yes, I'm supposed to write a knowledge base/technical article about it...and got distracted about halfway through.  Short info is that all new transformation files--both horizontal and vertical--are being put into the ArcGIS Coordinate Systems Data setup. GEOCON v1.0 is there and at ArcGIS Desktop 10.6 / ArcGIS Pro 2.1, we also added NTv2 files for Canada, Switzerland, Spain, and the United Kingdom. On the vertical side, we added geoid files for Japan and New Zealand.  Also at these versions, we merged the ArcGIS Pro all users/per machine and the ArcGIS Desktop/Server CSD setups so you only need to install it once. If you're using ArcGIS Pro per-single-user, there's a separate CSD per-single-user setup. Single-user setup is usually done if the person installing the software is not installing as an administrator. In that case, the software gets installed to the user's account location (C:\Users\<user name>).  You don't have to install everything in the CSD setup. There are sections for  North America (GEOCON) NTv2 Vertical World 1x1 (the 990 MB EGM2008 file) Vertical (all other vertical files) so you have partial control over what to install. Melita ... View more

rborchert‌ and [email protected]‌ are on the right track.  You can also post the extents, current coordinate system, plus where the correct one is--city, county, administrative district, latitude-longitude. That may help someone here figure out what's going on with the layer that has an incorrect coordinate system. Melita ... View more

Hi,  We don't have any NAD83(91) definitions. A dated NAD83 like usually means a HARN re-adjustment. Those were done state-by-state or a few states at a time over about 10 years. I usually group them into NAD 1983 (HARN) which then means you can use the existing HARN transformations that we have. Melita ... View more

Is it a feature class or shapefile? If it's a feature class, you made need to create a new feature class with the xy + z coordinate systems you want, and then load the data into it. ... View more

Hi Adriana, Starting at ArcGIS Pro 2.1 (per-machine / all users install) and ArcGIS Desktop/Server 10.6 can use the same ArcGIS Coordinate Systems Data installation. If you plan to use the per-user / one user version of ArcGIS Pro, you need to install the per-user ArcGIS Coordinate Systems Data setup.  The per-user install is often used when someone doesn't have administrative rights to the machine AKA super user access. In that case, we cannot install to the Program Files folder and instead need to install into the user's folder location.  Melita ... View more

Hi Siobhan,  Do you have access to the data producer? Was the diff-GPS survey originally done in ITRF or ETRS and converted to TM65 Irish Grid? If that's the case and we can find out what transformation was used, we can try to 'undo' it. Could it really be on IRENET95 Irish Grid? Melita ... View more

How close is it if you unproject to TM65 and redefine it as WGS84 AKA no transformation?  Alternatively, redefine the data as TM75 and use this transformation: TM75_To_WGS_1984_4_NTv2 which uses an NTv2 grid file.  Who created / what's the source of the Web Mercator data that you're comparing against? Melita ... View more

Hello Joan,  Generally, if a coordinate reference system (CRS) is added to the EPSG Geodetic Parameter Registry, Esri will add it to the software. I'm on the subcommittee that maintains the EPSG registry so I will pass on information from distributors and customers upon request.  Getting the information into the EPSG registry is useful because it's very public and available for other software besides Esri software.  Here's some of the information that EPSG will request beyond what you might expect: shapefile or coordinates outlining the area of usage. This is particularly important if the new CRS is usable both onshore and offshore.  Scope: ex. cadastral, engineering, surveying, etc. Anchor realization (fundamental point or ITRFxx) Datum epoch date I have an Excel spreadsheet that has sample data submission forms for the various types of objects that EPSG supports. You'll likely get one from the Chair if you submit a change request. If you'd like to see the form sooner, please send me an email, mkennedy at esri dot com. EDIT: The Change Request action on the EPSG website requires that you create a login. The login is not used beyond sending you notifications of updates to the registry if you opt-in. If you don't want to do that, contact me or technical support / international distributor and requests for new datums, coordinate reference systems, transformations, etc. will get to me and I can liaise with EPSG.  Although the EPSG name has been kept, the registry is now maintained by the Geodesy subcommittee of the Geomatics committee of the IOGP (International Association of Oil and Gas Producers).  Melita ... View more

Is the data approximately 10 km west of Palo, in the Philippines?  I looked at the other coordinate systems that we support for the Philippines, but none of them match the coordinates of your second dataset. The fact that it has negative and positive values implies that its center is in the area, so not a standard UTM or Philippines zone.  I have found some references to local cadastral grids/projections, so it's possible that is what the second data is using. You'd have to find out the parameters. I think the origin is usually the first point of the cadastral survey. Melita ... View more

Does ArcGIS see Database A as geographic data? If it doesn't, one possibility would be to write that data into a shapefile, then import the shapefile in the SDE database--let the software do the conversion to SDEbinary. There's likely another way to grab the coordinates from DB A, make a geometry and then write that to DB B, but I would expect it to be relatively slow. ... View more

According to this knowledge base article, it looks like it's not enough that the map document is using Conakry UTM 28N. The actual data layers must also be using Conakry UTM 28N. If they aren't, use the Project Tool to make copies of the data that are in Conakry UTM zone 28N. ... View more

What Joe said!  The module may also be trying to demonstrate that you can have data layers using one or more coordinate reference systems, and the data frame (map) use the same or a different coordinate reference system.  This is possible because the data frame will project "on-the-fly" the features of any vector layers or the raster layers from their native coordinate reference systems to the coordinate reference system of the data frame. Melita ... View more

Hi Mark,  In your desktop install folder, look in the documentation folder for geographic_transformations.pdf. It has the parameter values and the extents of the transformations. There's a direct link to it in the help. Look in the map projections section, first topic, bottom of the page. There's also this knowledge base article which has links to various versions of the PDF file. ... View more