Latest Contributions by BojanŠavrič

Hello @GrantHopkins1, I can imagine how difficult it is to know all little details about transformations and coordinate systems. Every country does this things a bit differently, which does not help GIS users. All that knowledge comes with experience and, with time, it gets easier. In cases when there is no transformation to desired GCS listed in the Geographic and Vertical Transformation Tables, I would suggest you reach out to your local Esri's distributor. I expect they would know any specifics for the country and have contacts to the local agencies. They can work with the agencies to obtain necessary information about possible transformations and clear any license restrictions. Once they obtain the information, they can contact us with details and we implement transformations. For the Ontario province, we do have definitions for transformations to NAD83 (CSRS) v3, WKID::8240, provided by NRCAN (I know this is not what your are looking for but it might help.): Due to license restrictions at the time we added these definitions into ArcGIS, we do not distribute the necessary NTv2 files with the ArcGIS Coordinate Systems Data software component. If you wish to try them out, you can download them from the NRCAN website or from here and add them to a specific CoordinateSystemsData\pedata subfolder on your machine. Files are sorted into folders by transformation method name, such as NTv2 or vertical\geoid. For these four transformations, you should add the NTv2 files to <System Drive>\Program Files (x86)\ArcGIS\CoordinateSystemsData\pedata\ntv2 folder. Please contact your local distributor if you have any troubles or need more detailed instructions.  To comment on @MattCriel's suggestion above. ArcGIS Pro is limited to 2-step transformation paths when projecting data on-the-fly. Unfortunately, this results in transformation paths that might not be geodetically correct (aka transforming between Canadian GCS-es via world-wide WGS 1984 GCS). This happens often when country has several GCS-es in use and one needs to transform/project data in several steps via multiple GCS realizations. For some applications, transforming data via WGS 1984 works OK, but I would not recommend it in general. I hope this helps, Bojan ... View more

@MatthewCriel Thank you for submitting your idea.  I believe ArcGIS Pro already supports several transformations between NAD 1983 (CSRS) and WGS 1984 geographic coordinate systems. If I set the map to NAD 1983 CSRS UTM Zone 16N (WKID::3160), I get the following possible transformation paths: In which coordinate system is your Canadian CSRS data? If it is using one of the NAD 1983 (CSRS) realizations (e.g. NAD83 (CSRS) v6, WKID::9644), we do not have any defined because none of the are registered with EPSG nor we can find them on Natural Resources Canada's website.   ... View more

Hi @CarlinAndrus: This may not be the exact point of this thread, but one way to address this issue is also correcting geographic coordinate system (GCS) definition in which your dataset is defined, GCS_NAD83_1986.  Original NAD 1983 GCS has many aliases that are used across the GIS community. One of them is probably also GCS_NAD83_1986, which is not in our database of synonyms. Therefore, software is treating this definition as a custom GCS, which does not have any predefined transformation to other GCS in the list of predefined GCS-es. The result is a missing transformation path and the warning. One way to fix this is to use Define Projection tool and correct GCS definition of your dataset to NAD 1983. This will resolve the conflict and transformation will no longer be required in your case. You can do this once on the dataset and it will fix it for every map in the project if that map is using "fixed" dataset. In case you cannot change GCS definition or you wish to keep it, you can also create a custom transformation between GCS_NAD83_1986 and NAD 1983. You can do this with Create Custom Geographic Transformation tool and providing appropriate transformation between your custom GCS of your data and GCS of your map. I hope this helps... ... View more

There are couple ways you can do this... I suggest the following workflow by customizing one of the existing projected coordinate systems designed for the world maps.  Go to Map -> Properties -> Coordinate Systems In XY Coordinate Systems Available navigate to Projected Coordinate System -> World This is the list of predefined projected coordinate systems (PCS) that one can use to display whole world. Most of them are centered on Greenwich, but you can easily change that. Right click on, e.g. Natural Earth (world), and select Copy and Modify... Change the Name of your new PCS and adjust the Central Meridian value to something like 150 degrees. Save -> OK.  Just a tip or two on map projections (PCS) that are good for the world maps... For thematic and general maps, select one with curved edges (pseudocylindricals), use cylindricals (aka "map in the box") for some rare phenomena that is based on longitude, and choose Mercator only if you are creating a sea navigation chart. Here is the list of Supported map projections. Each has Usage section, which gives you hints on appropriate usage. I hope this helps... ... View more

@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