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qgis / QGIS-Hub-Plugin

A QGIS plugins to fetch resources from the QGIS Hub
https://qgis.github.io/QGIS-Hub-Plugin/
GNU General Public License v3.0
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LAS2DEM utility produces elevation values equal to '0'. #95

Closed chuxohl closed 1 month ago

chuxohl commented 2 months ago

What is the bug or the crash?

I downloaded a LAZ file from TNRIS.org which is the Texas Geographic Information Office. I used the las2dem(file) option and picked the input laz file. I took all the defaults (step 1 and keep class 2). The DEM I got back had a number of linear stripes left in it. When I queried the stripe with the Identify Features tool I got a popup that indicated the value was zero. I tried changing to a step size of 2 to no avail. Stripes were still present.

I returned to the layer properties and discovered that the default Classification choice for symbology contained only the values of 'Unclassified' and 'Ground'. Thinking the 'Unclassified' was a problem I filtered them out and reran the process. This tool results in the same exact stripes.

My instinct suggests the conversion to raster has an issue. I do not know how to handle this situation. Please advise!

las2dem las2dem2

Steps to reproduce the issue

Download LAZ file Display in map canvas using browser Start las2dem(file) and load file Take defaults Name output file with .tif extension Display DEM using single band pseudocolor Use identify Features tool

QGIS and Plugin Versions

QGIS 3.38.2 LAStools 2.1.1

Operating System

Windows 11

ismailsunni commented 1 month ago

Hi @chuxohl this is not the correct place to submit QGIS bug report. Please submit it on https://github.com/qgis/QGIS/issues