# Lidar on Iphone - surveying of pre/post blast surfaces **URL:** \ **Category:** PIX4Dcatch Questions/Troubleshooting\ **Created:** [April 28, 2021, 2:55pm UTC](https://community.pix4d.com/t/lidar-on-iphone-surveying-of-pre-post-blast-surfaces/17829 "2021-04-28T14:55:08Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![Kapil\_Khanal](https://sea2.discourse-cdn.com/pix4d/user_avatar/community.pix4d.com/kapil_khanal/32/304_2.png) [@Kapil\_Khanal](https://community.pix4d.com/u/Kapil_Khanal)\ **Post date:** [May 10, 2021, 9:41pm UTC](https://community.pix4d.com/t/lidar-on-iphone-surveying-of-pre-post-blast-surfaces/17829/5 "2021-05-10T21:41:53Z")
Hello Ivan, As for the working range of the device: - For LiDAR, the range is up to 5 meters. - For photogrammetry, there is no predefined range, and the basic photogrammetry principles should be taken into account. Regarding the processing of LiDAR data, I would suggest you to go through the reply of Amritha in the below thread. > [@Is LiDAR data used during processing?](https://community.pix4d.com/t/is-lidar-data-used-during-processing/15416/19): > > Hi @gustavhf Thank you for writing to us. To answer your question: What exactly is the LiDAR data used for in the processing? If you use a LiDAR enabled iOS device, and choose to upload your project with the “Process with depth” enabled, the LiDAR data is used directly in two ways: To estimate a more accurate scale\* of the reconstruction and To fill low texture areas that photogrammetry alone is not able to reconstruct. It is important to note that visible features are still needed in all … --- _[View the full topic](https://community.pix4d.com/t/lidar-on-iphone-surveying-of-pre-post-blast-surfaces/17829)._