# Pix4D Mapper : Implementation of OSTN15/OSGM15 **URL:** \ **Category:** PIX4Dmapper\ **Created:** [August 26, 2021, 10:57am UTC](https://community.pix4d.com/t/pix4d-mapper-implementation-of-ostn15-osgm15/19464 "2021-08-26T10:57:50Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![mja](https://avatars.discourse-cdn.com/v4/letter/m/ba8739/32.png) [@mja](https://community.pix4d.com/u/mja)\ **Post date:** [August 26, 2021, 10:57am UTC](https://community.pix4d.com/t/pix4d-mapper-implementation-of-ostn15-osgm15/19464/1 "2021-08-26T10:57:50Z")
Hi there, Do you have a rough idea when Pix4D will fully support OSTN15 / OSGM15 for the UK? OSGB36 is not good enough, when dealing with RTK or PPK quality images. Regards ---
**Author:** ![Nikoleta\_Dimopoulou](https://avatars.discourse-cdn.com/v4/letter/n/53a042/32.png) [@Nikoleta\_Dimopoulou](https://community.pix4d.com/u/Nikoleta_Dimopoulou)\ **Post date:** [August 26, 2021, 12:21pm UTC](https://community.pix4d.com/t/pix4d-mapper-implementation-of-ostn15-osgm15/19464/2 "2021-08-26T12:21:00Z")
Hi @mja, Have you checked this community post regarding the workaround on how to use horizontal grid corrections and transformation in **Pix4Dmapper**? Have in mind that **[Pix4Dmatic](https://www.pix4d.com/product/pix4dmatic-large-scale-photogrammetry-software) supports the most common horizontal grid corrections and transformations.** > [@Horizontal grid corrections and transformations](https://community.pix4d.com/t/horizontal-grid-corrections-and-transformations/3325): > > Hi all, Update 1/5/2021: [Pix4Dmatic](https://www.pix4d.com/product/pix4dmatic-large-scale-photogrammetry-software) supports the most common horizontal grid corrections and transformations. The corrections will be used automatically based on the selected coordinate systems. More in the [How to use coordinate systems in Pix4Dmatic](https://support.pix4d.com/hc/en-us/articles/360045578171-How-to-use-coordinate-systems-in-Pix4Dmatic#Horizontal_grid_corrections_and_transformations) article. To use horizontal grid corrections and transformation in Pix4Dmapper, see the workaround mentioned below. If a horizontal coordinate system transformation is required to accurately transform your project’s Image Geolocation Coordinate … I hope this helps. Best, ---
**Author:** ![mja](https://avatars.discourse-cdn.com/v4/letter/m/ba8739/32.png) [@mja](https://community.pix4d.com/u/mja)\ **Post date:** [August 26, 2021, 12:46pm UTC](https://community.pix4d.com/t/pix4d-mapper-implementation-of-ostn15-osgm15/19464/3 "2021-08-26T12:46:58Z")
Hi Nikoleta, This is essentially the dodge round I use for our P4R. But given the UK’s national mapping system is OSTN15 / OSTN15 I feel that its implementation is important rather than a work around which is a bit faffy. Regards ---
**Author:** ![Nikoleta\_Dimopoulou](https://avatars.discourse-cdn.com/v4/letter/n/53a042/32.png) [@Nikoleta\_Dimopoulou](https://community.pix4d.com/u/Nikoleta_Dimopoulou)\ **Post date:** [September 1, 2021, 8:50am UTC](https://community.pix4d.com/t/pix4d-mapper-implementation-of-ostn15-osgm15/19464/4 "2021-09-01T08:50:09Z")
Hi @mja, For now this is the only workaround we have. Are the results satisfying? You could also use PIX4Dmatic which supports the OSGB 1936 / British National Grid - EPSG:27700. Here is also a guide on [How to vote for your favorite Pix4Dmapper feature requests/suggestions](https://community.pix4d.com/t/how-to-vote-for-your-favorite-pix4dmapper-feature-requests-suggestions/10032). You can create a new topic and vote for it. This way it will be registered as a feature request and it can get upvoted from other users as well. Thanks a lot for your feedback. Best, ---
**Author:** ![mja](https://avatars.discourse-cdn.com/v4/letter/m/ba8739/32.png) [@mja](https://community.pix4d.com/u/mja)\ **Post date:** [September 6, 2021, 7:51am UTC](https://community.pix4d.com/t/pix4d-mapper-implementation-of-ostn15-osgm15/19464/5 "2021-09-06T07:51:30Z")
Hi Nikoleta, I will create the new topic and vote for the national mapping system of the United Kingdom. ---
**Author:** ![owen.howells](https://avatars.discourse-cdn.com/v4/letter/o/b3f665/32.png) [@owen.howells](https://community.pix4d.com/u/owen.howells)\ **Post date:** [June 19, 2023, 1:41pm UTC](https://community.pix4d.com/t/pix4d-mapper-implementation-of-ostn15-osgm15/19464/6 "2023-06-19T13:41:49Z")
Just wondering, is this still an issue or has this been rectified? Currently evaluating Pix4D over Metashape, and advice would be great. ---
**Author:** ![Heydi\_Contreras](https://avatars.discourse-cdn.com/v4/letter/h/cc9497/32.png) [@Heydi\_Contreras](https://community.pix4d.com/u/Heydi_Contreras)\ **Post date:** [June 20, 2023, 8:15am UTC](https://community.pix4d.com/t/pix4d-mapper-implementation-of-ostn15-osgm15/19464/7 "2023-06-20T08:15:51Z")
Hi @owen.howells You could also use PIX4Dmatic, which supports the following vertical coordinate reference system with the geoid OSGM15: Belfast height - EPSG:5732 Douglas height - EPSG:5750 Lerwick height - EPSG:5742 Malin Head height - EPSG:5731 ODN (Offshore) height - EPSG:7707 ODN height - EPSG:5701 ODN Orkney height - EPSG:5740 St. Marys height - EPSG:5749 Stornoway height - EPSG:5746 For more information, please refer to > **[How to use vertical coordinate systems and geoids - PIX4Dmatic](https://support.pix4d.com/hc/en-us/articles/360044174411-How-to-use-vertical-coordinate-systems-and-geoids-PIX4Dmatic)** > > This article explains how to select the correct vertical coordinate reference system, geoid, or geoid height in PIX4Dmatic. > > >   > > What is a geoid model: The geoid is defined based on the earth's gra... I hope this information helps you. Have a very nice day! Best regards