Latest Contributions by BojanŠavrič

‎11-29-2019

No direct transformation to ITRF 2014 has been implemented in ArcGIS. We currently support three transformations related to SWEREF99, SWEREF99 to ETRS 1989, SWEREF99 to WGS 1984, and SWEREF99 to RT90. All three are the ones registered with EPSG. Does your customer has any official documentation about this transformation?

‎11-26-2019

Antony, you could also use customize azimuthal equidistant projection, and centered on the origin point in the Phillippines. This way your lines between origin and destination will be straight and shortest. Unfortunately, your map will look a bit unusual... Check it out.

‎10-25-2019

Both transformations, ITRF_2000_To_ITRF_2005_1 and ITRF_2005_To_ITRF_2008_2, are not null, Position Vector transformations with parameters. You can check them here: https://desktop.arcgis.com/en/arcmap/latest/map/projections/pdf/geographic_transformations.pdf As Dan Patterson‌ already replied, you need to check the optional Vertical parameter, which you did. If your input heights were ellipsoidal, then your output should be ellipsoidal heights in ITRF 2008 withing the accuracy of the used transformations. I hope this helps.

‎10-01-2019

In the upcoming release of ArcGIS 10.8 and ArcGIS Pro 2.5, the Spilhaus World Ocean Map in a Square will be supported as aprojected coordinate system based on the Adams square II map projection. Here is an ArcGIS StoryMap about how we uncovered and defined the projection, which shows the world’s oceans as a single body of water. John Nelson already got his hands on it and made some maps. Here is his blog post Spilhaus? More like Thrillhaus.

‎08-14-2019

Response to the original post: We already filter all available transformations by area of use of source and target geographic coordinate systems, plus the data extent. So, the list of transformations we return in Project tool and in Map Properties' Transformation section are already filtered. Are you looking for metadata of transformations, such as accuracy, extent values, percentage of data overlap? To Justin Odell‌: We would like to do that, we just haven't got it yet.

‎07-26-2019

Hello Jamal NUMAN! I just want to verify if I understand your comment correctly. Were you not able to line-up your data using any of the transformation paths below in map properties or by projecting it with project tool and available transformation paths below? Thanks!

‎07-03-2019

I am not sure if there is a predefined projected coordinate system for this area. Melita Kennedy‌ might now if something like that exist in the system. If not, you can always create a custom projected coordinate system. You can help yourself with projectionwizard.org. However, I am not sure if a projection for your area will automatically resolve your issue with data crossing the date line. Once you set up a projected coordinate system for your area, you will have to recreate the gray buffer zones to appear right. I also see you have some missing data of glaciers and rivers. Probably you will have to add those manually unless you find some other, better data you can use. I hope this helps. Good luck!

‎06-28-2019

Here is a story map‌ about map projections in ArcGIS: https://storymaps.arcgis.com/stories/ea0519db9c184d7e84387924c84b703f It shows a gallery of 68 map projections supported by projection-engine‌ in ArcGIS 10.7.1 and ArcGIS Pro 2.4. Happy mapping!

‎06-19-2019

I am not sure for certain, but I would start there.

‎06-19-2019

Aaron Padilla, would this graphics help? Please let me know if it does not.

‎06-19-2019

I would only add one more detail to Margaret Maher's response. When you look data in geographic coordinate system, it is displayed in pseudo-Plate Carrée projection. You still see distortion of the areas, especially at higher latitudes. World is rounded, but our screens are still flat and displaying data on the screen is the same issue as projecting data on the flat sheet of paper. I hope this makes sense.

‎03-19-2019

The Equal Earth, an equal-area projection, and the Peirce quincuncial, a conformal projection, are now available in ArcGIS 10.7 and ArcGIS Pro 2.3. The Equal Earth is an equal-area pseudocylindrical projection for world maps. It shows a pleasant appearance of the land features and its shape is similar to the well-known Robinson projection. The projection is appropriate for mapping global phenomena or for any other thematic world map that requires areas at their true relative sizes. It was jointly developed by Tom Patterson (US National Park Service, ret.), Bernhard Jenny (Monash University) and Bojan Šavrič (Esri) in 2018. It was published in IJGIS. Some behind-the-scenes look at how (and why!) it was created can also be found in ArcUser article. The Equal Earth map projection Equal Earth in use: Political and physical wall maps by Tom Patterson The Living Land by Esri Story Maps team 40 Years of Nautical Piracy by John Nelson The Peirce quincuncial map projection shows the world in a square. The projection is conformal except in the middle of the four sides of the square. It was developed by Charles S. Peirce in 1879. In his original design, the projection is centered at the North Pole, which displays the equator as a square rotated relative to the projection edge. The original implementation was on a sphere. Esri's implementation of this projection maintains its conformal properties on ellipsoids also such as WGS 1984. The projection can be tessellated or mosaicked. The Peirce quincuncial projection shown in square and diamond orientations. Happy projecting! Cover photo by John Nelson

‎02-22-2019

I am not aware of any data being stored in GCS Sphere GRS 1980 Mean Radius except this one. In your case, I assume data was created the same way; originally WGS 1984 data was being projected to Natural Earth projection using GRS 1980 Mean Radius Sphere with no particular transformation. In case, this is just one time thing, I suggest you first unproject your data to GEOGCS["GCS_Sphere_GRS_1980_Mean_Radius",DATUM["D_Sphere_GRS_1980_Mean_Radius",SPHEROID["Sphere_GRS_1980_Mean_Radius",6371008.7714,0.0]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]] and then use Define Projection tool to assign GCS WGS 1984 to it. If you have a lot of such data, then you can also Create Custom Geographic Transformation between WGS 1984 and GRS 1980 Mean Radius Sphere using null method. This transformation will consider both models to be the same and directly unproject and move your data back to WGS 1984.

‎02-14-2019

George, can you say what is your workflow and what product you are using? ArcMap 10.? or ArcGIS Pro 2.?? I added .csv file in Table of Contents using Pro 2.3 and I was able to select all four fields.

‎01-11-2019

In general, it depends on projection parameters projection has. Some can alter the overall shape of the map, some just shift coordinates, some change the aspect. In your particular example, the Lambert azimuthal equal-area projection will maintain its shape, low distortion near the center, deformations growing towards the periphery and the north will stay "up." What will change is the center of the map.

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My Ideas

Latest Contributions by BojanŠavrič

Re: ITRF2014 to SWEREF 99 Transformation

Re: Equal Area Projection that centers the Philippines

Re: Confirming whether ArcGIS Pro is doing a Horizontal AND Vertical datum transformation between ITRF00 and ITRF08 for raster?

The Spilhaus map of the oceans will be supported in the next release of ArcGIS

Re: Geographic Transformations tool instead of PDF

Re: “Shift” tool has performance issue,

Re: What is the projection for Russia and Alaska area ?

Map Projections in ArcGIS Story Map

Re: Information on the Coordinate Systems desktop install?

Re: Information on the Coordinate Systems desktop install?

Re: No need for projections?

Two new map projections available in ArcGIS 10.7 and Pro 2.3

Re: Reproject Patterson Natural Earth to WGS84 (or anything, really)

Re: CSV add X, Y

Re: A Projected Coordinate Systems that covers the entire Atlantic Ocean?

UC 2026 presentations and more!

Re: CGVD28 to CGVD2013 Transformation File Format

Re: In the continental U.S., is the Geoid above or...

Re: Adding local geoid

Re: Effects on Horizontal Coordinate System When C...

Coordinate Reference Systems