Questions in topic: "lidar" https://knowledge.亚搏在线safe.com/questions/topics/single/38336.html The latest questions for the topic "lidar" Polygon Around Raster Image https://knowledge.亚搏在线safe.com/questions/87337/polygon-around-raster-image.html

Hi all,

Does anyone know of an easy method to create a polygon around part of a LiDAR tile where the LiDAR tile does not have a complete set of values or is not complete?

So in the example below I would like to create a polygon around the colored sections (crudely drawn in red),not the whole tile.

I have tried the RasterExtentsCoercer,but that just creates a polygon over the whole tile.

Thanks all.


 raster polygon lidar Thu,21 Feb 2019 14:17:17 GMT juffers LAS data attributes does not have x,y and z.But I can see x,y,z in data inspector. https://knowledge.亚搏在线safe.com/questions/86536/las-data-attributes-does-not-have-x-y-and-z-but-i.html

I have LAS files that do not have any x,y,z fields to hold such values (seen in the image).Any way to fix it?I want to then export the x,y,z values to a csv file if possible or use it for further analysis.


 fme fmedesktop las lidar las point cloud Thu,07 Feb 2019 00:46:01 GMT danishukani Is there a way to do nearest neighbor with LiDAR data and (point) vector data? https://knowledge.亚搏在线safe.com/questions/86384/is-there-a-way-to-do-nearest-neighbor-with-lidar-d.html

I am a first time FME user.I want to analyse the closest LiDAR points that are to my point data (pit).I tried using NeighborFinder but I guess it does not like LiDAR data and produces a empty .shp file or .gdb file.I want my .shp or .gdb with the nearest 5 LiDAR points that are averaged to produce a z value for my point vector data (pit data).It will be very kind if someone could help me with what code I would need to produce the required result?


PS: plz disregard the aerial image in the background.

 fme fmedesktop lidar arcmap Tue,05 Feb 2019 06:07:52 GMT danishukani How do I export z values from a LAS file to a .shp file or a geodatabase? https://knowledge.亚搏在线safe.com/questions/86322/how-do-i-export-z-values-from-a-las-file-to-a-shp.html

I am trying to export z values from my LiDAR data so that I can further analyse in ArcMap.I cannot use the LAS extension available in ArcMap so it would be best if it could be done in FME.

 gis fmedesktop lidar arcmap Mon,04 Feb 2019 04:31:23 GMT danishukani Clip or Intersect LAS data to a point vector layer https://knowledge.亚搏在线safe.com/questions/86229/clip-or-intersect-las-data-to-a-point-vector-layer.html

I have LiDAR data with elevation data attached to it.I want to reduce the LiDAR data to the black dots (drainage pits) and deduce z values for all the pits.Is there a way to do it?

 gis fme lidar Fri,01 Feb 2019 15:06:32 GMT danishukani Creating a flat surface on lidar data https://knowledge.亚搏在线safe.com/questions/79846/creating-a-flat-surface-on-lidar-data.html

Hello to all forum members,

I am looking for a solution for searching on a point cloud (*las) of a set with parameters:

1.The height of the set of points does not differ from each other by 0.03 [m],(flat surface)
2.The set creates a rectangular plane with an area of not less than 25-30 [sqr m],(5x5,4x7 etc.)

Below the 亚搏在线workflow on which I stopped.

Thank you for your help.

 3d lidar flat surface Thu,04 Oct 2018 19:50:39 GMT piotrek6116 .las to .kml conversion https://knowledge.亚搏在线safe.com/questions/77920/las-to-kml-conversion.html

I am very new to FME and was wondering if it's possible to convert las/laz files to kml directly.Apparently it's not a straightforward process and I'd appreciate any suggestions on what transformers to use,in what order,etc.Thank you very much in advance!

 lidar las point cloud google earth Thu,06 Sep 2018 14:38:14 GMT mhalubok Change Detection with LiDAR https://knowledge.亚搏在线safe.com/questions/77005/change-detection-with-lidar.html

I'm hoping someone can point me to a step-by-step article or post on how to use LiDAR from 2 different years to detect changes in topography.I've found this Q&A Forum answer...

https://knowledge.亚搏在线safe.com/questions/2487/lidar-feature-extraction.html

...but it's sort of a broad-strokes overview of the process,and not detailed enough for me to do anything with,having never tried this before (on any platform).

Thanks for any help you can offer!

P.S.- My organization is using FME 2016.

 point cloud changedetector lidar surfacemodeller Thu,23 Aug 2018 17:15:20 GMT westdakota Creating Minecraft worlds from orienteering Maps https://knowledge.亚搏在线safe.com/questions/74115/creating-minecraft-worlds-from-orienteering-maps.html

I have created a prototype workspace to create a 3D minecraft world by combining the 2D surface feature data from an orienteering map and a Lidar point cloud for the topography.

Here is what the source map looks like

And here is the resultant minecraft world -

This workspace generated a Minecraft map of our local intermediate school which I have just created an orienteering map for.I have tried the workspace out on other urban orienteering maps (including one with lakes and tramways) and it worked pretty well,but it probably needs a bit more work for forest Orienteering maps.

There is still work to do on this template.I would welcome comments and contributions on how to improve it.All features are not yet modelled.More clipping needs to be done for overlapping features.Z data needs to be built into railways.But I'd call it a good start (from a GIS beginner),and it potentially opens up a world of "virtual orienteering"!

I have uploaded an example template here --> https://hub.亚搏在线safe.com/templates/ponsint-las2minecraft5

 lidar minecraft dxf orienteering Tue,10 Jul 2018 22:46:04 GMT markfrater LiDAR Cloud Point (.las) to DEM Raster With Spectrum Colors Based On Elevation Values https://knowledge.亚搏在线safe.com/questions/74043/lidar-cloud-point-las-to-dem-raster-with-spectrum.html

Hello,

Is there a way to convert LiDAR Cloud Point (.las) to DEM Raster With Spectrum Colors Based On Elevation Values?

I see the following post (https://knowledge.亚搏在线safe.com/articles/1345/creating-a-raster-from-a-point-cloud.html),but just hope the expert may show me how to colorize the raster image with Spectrum Color like following image:

Thanks a lot,

Reno

 raster dem lidar Mon,09 Jul 2018 20:05:08 GMT renosungis how to extract 2d building foot print from lidar point cloud https://knowledge.亚搏在线safe.com/questions/71856/how-to-extract-2d-building-foot-print-from-lidar-p.html

how can i get 2d building foot print from lidar point cloud data?

 point cloud lidar Wed,06 Jun 2018 14:42:05 GMT purnima1298 how to create lod2 city gml model using lidar data ? https://knowledge.亚搏在线safe.com/questions/71830/how-to-create-lod2-city-gml-model-using-lidar-data.html

i have a lidar data for which i have to create a lod2 city gml model.how can it be done?

 3d lidar lod2 Wed,06 Jun 2018 14:41:42 GMT purnima1298 remove overlaps in pointcloud ? https://knowledge.亚搏在线safe.com/questions/71109/remove-overlaps-in-pointcloud.html

Is there a tool or 亚搏在线workflow to remove or classify overlaps in a LAS file?

 lidar Fri,25 May 2018 09:17:08 GMT robertdbuckley how to classify lidar point cloud into building using las classify tool? https://knowledge.亚搏在线safe.com/questions/70880/how-to-classify-lidar-point-cloud-into-building-us.html

i need to classify the lidar point cloud to building alone.in las classify tool it classifies into building trees etc.how to classify only building?

 point cloud las lidar buildings classification Wed,23 May 2018 14:53:12 GMT purnima1298 What is acceptable for FME Augemented Reality Writer? https://knowledge.亚搏在线safe.com/questions/68602/what-is-acceptable-for-fme-augemented-reality-writ.html

I'm trying to visualize a scene using the FME Augmented Reality (AR) writer.

As an Input I have a point cloud,and have shifted the origin with Offsetter.I used a PointCloudSurfaceBuilder to get a 3d object in the scene.

The resulting model is full of holes,and the color attribute is not preservered,and although crude the model is with holes.

I would like to know if some have had more succes and have been able to add the color information to the model?

 lidar augmented reality Thu,19 Apr 2018 18:46:58 GMT grootstebozewol