Latest Contributions by BojanŠavrič

@BenPearse, I presume you would like to use your local geoids to transform your DEM data to some other vertical coordinate system. Unfortunately, ArcGIS Pro currently does not support custom vertical transformations, but it is part of our plans for the future releases. For current workaround, I would suggest you use raster calculator to modify the heights first (make sure all raster have heights in the same linear units) and then use Define Projection tool to correct the vertical coordinate system definition on your modified DEM dataset.  I hope this helps, Bojan ... View more

I am not sure. Do you have more dropdown menus listed under "Core Products" in the main window? If not, I would suggest you to contact your administrator and ask them where you can find ArcGIS Coordinate System Data installs. I hope this help...  ... View more

Additional Coordinate System Data install can be downloaded from My Esri download page. It does not require additional license, just access to your organizational My Esri account. This graphic might help you located the install on the side. The thread includes some information on the installs and here is a little bit extra information. I hope this helps. -------- On the side note... Your shuksan.tif dataset has mixed-up coordinate systems. EGM96 is gravity-related vertical CS based of WGS84. So any EGM96 data should be combined with WGS84 geographic CS. Before you will be able to transform your vertical data, you will need to move your data to WGS 1984 geographic coordinate system using (1) Project Raster tool and (2) Vertical Checkbox unchecked. This step will only change your horizontal coordinates and keep your heights the same. In the following step, you should be able to transform your data from WGS84/EGM96 to NAD 1983 State Plane Washington…/NAVD 1988 with (1) Project Raster tool, (2) Vertical Checkbox checked, and (3) Coordinate System Data installed. ... View more

When you clear Data Frame's coordinate system, ArcMap reads any data as it would be provided in Map's units, defined in Data Frame Properties -> General. It will completely ignore data's coordinate systems and there will be no projection on-the-fly. The same data, one in meters and one in US Feet will be offset for a lot and data in geographic coordinates will be very very small, located in null-island. Basically nothing will line up. When you add more data after clearing a coordinate system, that will overwrite your previous selection and your Data Frame's coordinate system will be the one of your new data. Since Define Projection tool does not add new data, I assume this tool does not overwrite the cleared coordinate system, but Project tool most likely does. I suggest you add all your data you wish to explore before clearing a coordinate system. As I mentioned above, clearing a coordinate system from your map is risky and you really need to know what you are doing. Tools do not work properly and it might lead to data corruption. Therefore, ArcMap overwrites cleared coordinate system every time it can. ... View more

You can always change the coordinate system of your map. In your ArcMap project, go to Layers -> Properties. In Data Frame Properties window, open Coordinate System tab, navigate to Layers folder and select a coordinate system of the layer you wish to explore. If you still wish to clear a coordinate system of your Data Frame, under "Coordinate System" tab, go to "Add Coordinate System" and select "Clear." "Apply" or "OK." Please note that if your Data Frame does not have specified a coordinate system, a lot of things might not work, and some tools might produce incorrect results. Clearing a coordinate system form a Data Frame can be useful, but it is also dangerous.  ... View more

BUG-000096165 and  BUG-000135135 (based on their repro steps) appear to be resolved with the latest release, and both issues should be soon marked appropriately. Thanks! ... View more

Hi @JoeLandersarup, With the new Transformation UI in Pro 2.7, we resolved some issues regarding custom transformations described here. Can you please share with me your dataset, TPEN11-TM.prj, TPEN11-IRF and NTv2 .gsb files, so we can test it? I sent you my contact via direct message. Thanks! Bojan   ... View more

Hi @RichardDaniels, Colleagues are following the NSRS 2022 development and they have been attending the industry partner summits given by NGS, and attending or listening to the webinars that NGS has been giving for the last few years. There’s not much to do right now as NGS hasn’t released any transformation grid files or officially, any of the new state plane zones or other coordinate systems. We plan to do testing as soon as any data becomes available. Last June, NGS announced that they were not going to make their 2022 end-of-year deadline and are instead aiming for 2024 or 2025. One change that’s coming is that the new state plane zones will use transverse Mercator, oblique Mercator, and a variant of Lambert conformal conic. Currently, it’s a 2 standard parallel case. The new zones will use what’s known as a 1 standard parallel case. It includes a scale factor, which effectively turns into a 2 standard parallel case. In ArcGIS Pro 2.6, we added two variants to the Lambert conformal conic projection to have them ready for NSRS 2022 state plane zones.  Bojan ... View more

Thank you, @DanielEccles, for your inquiry.  Currently, ArcGIS Pro doesn't not include a vertical transformation using OSGM15 geoid model to covert heights to Newlyn (WKID::5701). It is on our list and we are working on it to make it available.  Unfortunately, Pro also doesn't support custom vertical transformations, so you cannot just add a new one to the set. This is also something on our list, but some other projects came up and we haven't been able to get to it. ... View more

Hi @akisai, Transformation parameters you are using match NAD_1983_CSRS_To_WGS_1984_2 (WKID::1946) transformation, but they have opposite +/- signs. From your formulas, I see your rotation matrix matches the one for Position Vector and not the Coordinate Frame method. In your case, you are trying to apply the transformation in reverse (from WGS84 to NAD83 CSRS) by using transformation parameters and rotation matrix with opposite signs as they are originally defined. I would need to verify the math first, but I suspect your approach might not match the exact reverse formulas used in ArcGIS. Please see EPSG Guidance Note 7.2 for detailed (exact reverse) formulas and the table of Geographic Transformations in ArcGIS Pro 2.7. I hope this helps... ... View more

Hi Ilia Neudakhin‌! Length calculates a Cartesian length of segments as they appear in a projected coordinate system, in your case the WGS 1984 UTM Zone 15N. Geodesic Length of your segments is always calculated as they appear on the Earth's surface model (in a geographic coordinate system), in your case this is WGS 1984. The WGS 1984 UTM Zone 15N is defined with transverse Mercator projection, which enlarges most areas and distances compare to the true areas and distances on the Earth's surface. This projection, used in the WGS 1984 UTM Zone 15N, is the reason why the Geodesic Length is shorter everywhere.  I hope this helps... ... View more

I am sorry David. I am not sure why this is happening. I am tagging few people and groups on this post and maybe someone will be able to assist you.  Simon Woo‌ Imagery and Remote Sensing‌ raster export‌ raster projection‌ export raster‌  ... View more

David, You could use custom geographic coordinate systems (GCS-es) and set of custom transformations (GT-s) to rotate your raster. See the workflow below.  NOTE: Described workflow is not recommended for high accuracy data and ellipsoids, and it does not work well with vector data.  Suggested workflow To generate a map the globe gores centered on 100° W 40° N, you need to rotate your center point to the North Pole. One way to accomplish that would be using two custom GCS-es and two custom GT-s: 1) Open coordinate system picker, create and store in Favorites two custom GCS-es: e.g. RotatedGlobe1 and RotatedGlobe2. 2) Create a custom geographic transformation from GCS of your data, e.g. WGS 1984, to RotatedGlobe1 GCS. In my example, I used Coordinate Frame method, which includes rotation parameters, passed in seconds: -100° = -360 000". You could also use Longitude Rotation method in this step. This rotates your raster around Earth's rotation axis, or Z-axis and shifts everything to 100° W meridian. 3) Create another custom geographic transformation from RotatedGlobe1 GCS to RotatedGlobe2 GCS. This time you rotate around Y-axis for 50° = 180 000".  This moves your point, 100° W 40° N, to the "North Pole" location. 4) You go back to map properties and select map's coordinate system to be RotatedGlobe2 GCS and select two custom transformations to rotate your data properly.  Here is the resulting rotated raster: 5) You can also create a custom polyconic projected coordinate system and automatically project your data. Note: In ArcGIS Pro 2.5, there are some issues with reading custom coordinate systems from Favorites, so you might have to manually input correct GCS definition when creating it. If done correctly, it will pick your custom transformations.  Here is the result. 6) You might want to overlay with un-transformed graticule to properly clip a gore. Create a copy of 15° graticule vector layer, use Define Projection tool to change GCS of that layer to be RotatedGlobe2 GCS, and add it to your map.  7) To generate other gores, just change Central Meridian parameter to shift everything to the center of the next gore.  Again, you might have to manually input correct GCS definition when creating it due to a bug in ArcGIS Pro 2.5. ... View more