# Best Setting for PPK Image from P4RTK mapping site **URL:** \ **Category:** PIX4Dmapper Questions/Troubleshooting\ **Created:** [December 10, 2022, 7:44am UTC](https://community.pix4d.com/t/best-setting-for-ppk-image-from-p4rtk-mapping-site/24849 "2022-12-10T07:44:06Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![wizardmagic49](https://avatars.discourse-cdn.com/v4/letter/w/51bf81/32.png) [@wizardmagic49](https://community.pix4d.com/u/wizardmagic49)\ **Post date:** [December 10, 2022, 7:44am UTC](https://community.pix4d.com/t/best-setting-for-ppk-image-from-p4rtk-mapping-site/24849/1 "2022-12-10T07:44:06Z")
Hi, I’m wondering what is the best setting for my project. Please explain the pros and cons of these methods to me. First, I use topodrone to do PPK from my faithful R10 base station and RTK-GCP from the same base. from this my image has new geotag. Now for photogramy. The best looking setting method number 1 ( I think ). Geoid hight above WGS 84 Ellipsoid = 0.00 Edit Horz. Vert. Accuraice 0.01 m camera model - edit estimate from EXIF camera optimization - All prior Then step 1 : ![image](https://global.discourse-cdn.com/pix4d/original/2X/2/259bb612d5d87f673dc2f378fac811e3ef3f84d1.jpeg) The nature camera from pix4d methods number2 Geoid hight above WGS 84 Ellipsoid = 0.00 Edit Horz. Vert. Accuraice 0.02 m equal to GCP Horz. Vert. Accuraice (default) camera model - from pix4d database camera optimization - All Look promising too. but not the best. Thank you for your time. > [@DJI Phantom 4 RTK camera model](https://community.pix4d.com/t/dji-phantom-4-rtk-camera-model/12047): > > I ran into a problem that I wanted to share because it took me a long hours to discover the problem. Seems, that P4RTK has different camera models and even latest Pix4Dmapper (4.5.6) does not have all of them in database. When I imported pictures, Pix4D automatically recognized cameral model P4RTK, but after initial processing calibrated camera computed positons some of them were wery wrong locations and after final processing the point cloud was very stretched / very wrong. I did all other tr… > [@Processing DJI Phantom 4 RTK datasets with PIX4Dmapper](https://community.pix4d.com/t/processing-dji-phantom-4-rtk-datasets-with-pix4dmapper/7823): > > Edited on 4th of September 2020 For datasets acquired with DJI Phantom 4 RTK (P4RTK) we recommend the following workflow: Creating a project [Configuring the image properties:](https://support.pix4d.com/hc/en-us/articles/202557309-Step-2-Creating-a-Project#label3) No action required. (RTK) Image geolocation, horizontal and vertical accuracy is automatically recognized when importing the images. No action required. (PPK) After PPK postprocessing in a third party software, accurate image geolocation can be imported using the [Image geolocation file](https://support.pix4d.com/hc/en-us/articles/202558539-Input-files#label2) (.csv, .txt, .dat). If necessar… ---
**Author:** ![Mike\_K](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/mike_k/32/4697_2.png) [@Mike\_K](https://community.pix4d.com/u/Mike_K)\ **Post date:** [December 14, 2022, 7:50pm UTC](https://community.pix4d.com/t/best-setting-for-ppk-image-from-p4rtk-mapping-site/24849/2 "2022-12-14T19:50:06Z")
Since you are using a Phantom 4 RTK I would also use the Accurate Geolocation and Orientation for the calibration method. ![Calibration Method-Accurate Geolocation (Highlighted)](https://global.discourse-cdn.com/pix4d/original/2X/9/9e0b2555786e5da1c152bd4f2b4e200eded94695.png) ---
**Author:** ![wizardmagic49](https://avatars.discourse-cdn.com/v4/letter/w/51bf81/32.png) [@wizardmagic49](https://community.pix4d.com/u/wizardmagic49)\ **Post date:** [December 15, 2022, 6:21am UTC](https://community.pix4d.com/t/best-setting-for-ppk-image-from-p4rtk-mapping-site/24849/3 "2022-12-15T06:21:39Z")
Linear Rolling Shutter Is it recommended? and when to use Geometrically Verified Matching? Best regards. ---
**Author:** ![Mike\_K](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/mike_k/32/4697_2.png) [@Mike\_K](https://community.pix4d.com/u/Mike_K)\ **Post date:** [December 15, 2022, 3:34pm UTC](https://community.pix4d.com/t/best-setting-for-ppk-image-from-p4rtk-mapping-site/24849/4 "2022-12-15T15:34:09Z")
The Phantom 4 RTK has a global shutter. No need to use the linear rolling shutter correction for this drone. Geometrically Verified Matching is useful when many similar features are present throughout the project: rows of plants in a farming field, window corners on a building’s facade, etc.