[GRASS-user] remove buildings and non-natural items from DEM

GRASS GRASS user
, ,
1

Hi there,

I’m running GRASS 7.x from OSGeo Live and I have a 7Gb GeoTiff DEM of my city which was acquired by LIDAR.
But, before generating itens like countours, slope, relief, etc… we’d like to remove non-natural objects such as buildings, constructions, light poles, tree and in first, to a have terrain model (surface height) before generating derived products.

What modules/functions of GRASS should I research for? Or maybe use some combination with other tools? (QGIS, GDAL DEM)

thanks in advance,

···

Eduardo Patto Kanegae
http://www.webmapit.com.br | @webmapit

2

On Thu, May 25, 2017 at 4:53 AM, Eduardo Kanegae
<eduardo.kanegae@gmail.com> wrote:

Hi there,

I'm running GRASS 7.x from OSGeo Live and I have a 7Gb GeoTiff DEM of my
city which was acquired by LIDAR.
But, before generating itens like countours, slope, relief, etc... we'd like
to remove non-natural objects such as buildings, constructions, light poles,
tree and in first, to a have terrain model (surface height) before
generating derived products.

What modules/functions of GRASS should I research for?

Please take a look at
https://grass.osgeo.org/grass72/manuals/vectorintro.html#lidar-data-processing
--> Lidar data processing

where related modules are listed.

Best,
Markus