topic Re: Matching up two different LiDAR datasets in 3D Mapping Questions https://community.esri.com/t5/3d-mapping-questions/matching-up-two-different-lidar-datasets/m-p/763501#M44 <HTML><HEAD></HEAD><BODY><P>Are you starting with the raw LAS pointcloud file or a processed bare earth raster?</P></BODY></HTML> Tue, 11 Oct 2016 18:49:18 GMT DarrenWiens2 2016-10-11T18:49:18Z Matching up two different LiDAR datasets https://community.esri.com/t5/3d-mapping-questions/matching-up-two-different-lidar-datasets/m-p/763500#M43 <HTML><HEAD></HEAD><BODY><P>Hello! I am trying to compare two different LiDAR data sets to look at soil erosion. I am fairly new to using LiDAR and have hit a snag. The two datasets have different resolution, with one being roughly .4 meters and the other almost 1 meter. With the varying resolutions I cannot properly match them up to use things like raster calculator. How do I reduce the resolution of one dataset to match the other? Or am I going about this solution wrong? Any help or suggestions greatly appreciated!</P></BODY></HTML> Tue, 11 Oct 2016 18:30:45 GMT https://community.esri.com/t5/3d-mapping-questions/matching-up-two-different-lidar-datasets/m-p/763500#M43 MichaelMadsen1 2016-10-11T18:30:45Z Re: Matching up two different LiDAR datasets https://community.esri.com/t5/3d-mapping-questions/matching-up-two-different-lidar-datasets/m-p/763501#M44 <HTML><HEAD></HEAD><BODY><P>Are you starting with the raw LAS pointcloud file or a processed bare earth raster?</P></BODY></HTML> Tue, 11 Oct 2016 18:49:18 GMT https://community.esri.com/t5/3d-mapping-questions/matching-up-two-different-lidar-datasets/m-p/763501#M44 DarrenWiens2 2016-10-11T18:49:18Z Re: Matching up two different LiDAR datasets https://community.esri.com/t5/3d-mapping-questions/matching-up-two-different-lidar-datasets/m-p/763502#M45 <HTML><HEAD></HEAD><BODY><P><SPAN>Well I have created a bare earth raster from the raw LAS pointcloud file but the pixels are not lining up.&nbsp;</SPAN></P></BODY></HTML> Tue, 11 Oct 2016 18:55:46 GMT https://community.esri.com/t5/3d-mapping-questions/matching-up-two-different-lidar-datasets/m-p/763502#M45 MichaelMadsen1 2016-10-11T18:55:46Z Re: Matching up two different LiDAR datasets https://community.esri.com/t5/3d-mapping-questions/matching-up-two-different-lidar-datasets/m-p/763503#M46 <HTML><HEAD></HEAD><BODY><P>My guess would be to set the sampling type to CELLSIZE and set the sampling value to 1 for both in the <A href="http://resources.arcgis.com/en/help/main/10.1/index.html#//001200000052000000">LAS Dataset to Raster</A> tool. The tool also honors the <A href="http://resources.arcgis.com/en/help/main/10.1/index.html#//001w0000001s000000">Cell Size</A> and <A href="http://resources.arcgis.com/en/help/main/10.1/index.html#//001w0000000m000000">Snap Raster</A> environments, so you can try setting those to be double sure that the rasters match exactly..</P></BODY></HTML> Tue, 11 Oct 2016 20:10:41 GMT https://community.esri.com/t5/3d-mapping-questions/matching-up-two-different-lidar-datasets/m-p/763503#M46 DarrenWiens2 2016-10-11T20:10:41Z Re: Matching up two different LiDAR datasets https://community.esri.com/t5/3d-mapping-questions/matching-up-two-different-lidar-datasets/m-p/763504#M47 <HTML><HEAD></HEAD><BODY><P><SPAN style="font-size: 11.5pt; color: #3d3d3d;">Another process that might work would be to take the raw lidar point clouds and add them to mosaic datasets with a filter of ground only. &nbsp; &nbsp; Give both the same point size (smallest) and use triangulation instead of binning. &nbsp;Then add an arithmetic function to one&nbsp;</SPAN>to minus the other, that will give you a difference image you can export. &nbsp;&nbsp;Have it set to bilinear interpolation for the mosaic dataset.</P><P></P><P>Arthur Crawford - Esri</P></BODY></HTML> Tue, 11 Oct 2016 21:30:30 GMT https://community.esri.com/t5/3d-mapping-questions/matching-up-two-different-lidar-datasets/m-p/763504#M47 ArthurCrawford 2016-10-11T21:30:30Z Re: Matching up two different LiDAR datasets https://community.esri.com/t5/3d-mapping-questions/matching-up-two-different-lidar-datasets/m-p/763505#M48 <HTML><HEAD></HEAD><BODY><P>Worked perfectly, the mosaics line up great and I was able to carry out a minus function.Thanks!</P></BODY></HTML> Wed, 12 Oct 2016 19:51:55 GMT https://community.esri.com/t5/3d-mapping-questions/matching-up-two-different-lidar-datasets/m-p/763505#M48 MichaelMadsen1 2016-10-12T19:51:55Z Re: Matching up two different LiDAR datasets https://community.esri.com/t5/3d-mapping-questions/matching-up-two-different-lidar-datasets/m-p/763506#M49 <HTML><HEAD></HEAD><BODY><P>Glad it worked for you! &nbsp; I work with mosaic datasets to extract buildings and tree from lidar. &nbsp; Check out my blog&nbsp;<A href="https://community.esri.com/people/acrawford-esristaff/blog/2016/07/18/arthurs-feature-extraction-from-lidar-dems-and-imagery">https://community.esri.com/people/acrawford-esristaff/blog/2016/07/18/arthurs-feature-extraction-from-lidar-dems-and-imagery</A>.&nbsp;</P></BODY></HTML> Wed, 12 Oct 2016 19:58:13 GMT https://community.esri.com/t5/3d-mapping-questions/matching-up-two-different-lidar-datasets/m-p/763506#M49 ArthurCrawford 2016-10-12T19:58:13Z