Questions tagged [building-heights]
The building-heights tag has no usage guidance.
25
questions
7
votes
3
answers
4k
views
Creating building shadows in QGIS?
Can anyone think of a simple way to create a polygon to represent building shadows?
I have a shapefile with height information for the buildings and I want to create a simple plan looking like the ...
- 161
7
votes
1
answer
913
views
Using Z-Values instead of attribute Z?
To locate any vertex, it is spatially described with x and y coordinates - of course. You can also add Z and M values - but what is the advantage to use the Z in the vector instead of a attribute Z in ...
- 8,262
5
votes
1
answer
3k
views
CHM (Canopy height model) = DSM (Digital surface model) - DTM (Digital terrain model)
I want to create a canopy height model (CHM) which has the height of objects (trees, building, etc.) from DSM and DTM. Below is the step by step procedures which I did so far.
I use open source s2p ...
- 258
4
votes
1
answer
251
views
Summing attributes of different shapes into another (height of contours + height of buildings)
I'm using QGIS 2.18.
I need to calculate the height of the rooftop of each building in a neighborhood. I have a vector shape of the buildings, with the building height attribute (from the ground to ...
- 103
3
votes
0
answers
718
views
3D buildings from OSM data for historical interaction
What I am trying to do:
Have a 3D interactive map, embedded on a website, that allows viewers to click on buildings which opens up a 'more info' HTML overlay with links/text/images about that specific ...
- 141
3
votes
0
answers
1k
views
How to extract height of building and roof structure from nDSM data
I am working with QGIS; SAGA; OrfeoToolbox and I try to create LOD1 and LOD2 building models.
I need help to recreate LOD1 (or LOD2) building models from DSM / LIDAR data.
I have a footprints of ...
- 81
2
votes
1
answer
1k
views
Extruding building heights from 3D terrain model creates sloped buildings
How can i prevent sloped buildings when I extrude building footprints over sloped terrain? I am using FME to drape 2D features over terrain (SurfaceDraper), then using the Extruder transformer to ...
- 763
1
vote
2
answers
304
views
QGIS 2.5D-buildings stretched
I have managed to create a 3D-landscape from DEMs and are trying to get my building layer in 2.5D in this landscape. My buildings are retrieved as polygons with height defined in the attributes. When ...
- 11
1
vote
1
answer
3k
views
Heights of buildings using QGIS
I need to display the heights of the buildings from a given map using QGIS.
I do have OS vector map district data from ordnance survey (https://www.ordnancesurvey.co.uk/) web site that is supposed to ...
1
vote
1
answer
2k
views
Getting buildings multipatch from LiDAR data without building footprints?
I have a 3D LiDAR data and aerial images.
Is there a way to obtain the buildings multipatch (.shp), given that I don't actually have the buildings' footprints?
1
vote
1
answer
347
views
Estimating building and vegetation volume with unclassified LiDAR datasets?
I'm trying to determine the ratio of building to vegetation change (i.e. how has the volume of built structures changed in proportion to the volume of vegetation) in a city over a period of five years....
- 11
1
vote
1
answer
436
views
EMU Building Heights Layer and QGIS
I am new to using QGIS and for a recent project I am looking at the building heights for London. I have managed to download the free EMU Building Heights Layer and added into my existing file, through ...
- 31
1
vote
1
answer
281
views
Know the shadows of a house before building it
Imagine a house/building, seen from outside, at sunrise. As the the sun moves in the horizon, a) the shadow of the house is displaced/deformed, and b) some faces of the house have more/less sunlight ...
- 65
1
vote
2
answers
416
views
Mapzen / Tangram topojson building data alternatives
I'm using Vizicities to visualise 3d building data on a map. Vizicities uses Mapzen vector tiles:
http://tile.mapzen.com/mapzen/vector/v1/buildings/{z}/{x}/{y}.topojson?api_key=[key]
With Mapzen ...
1
vote
1
answer
1k
views
Buildings height extraction
I am a QGIS new user and I want to extract the buildings height of a territory. I clipped the raster with the LiDar informations with the buildings polygons; after I have extract the contours level ...
- 39
1
vote
0
answers
304
views
Frontal Area of buildings using QGIS
I have to calculate the frontal area index of buildings in a city (λf) which is the total area of buildings projected into the plane normal to the wind direction (Aproj) divided by the ground plan ...
- 21
1
vote
0
answers
75
views
Associate height information from DTM/ DSM to polyline
I have both DTM and DSM files of a city and would like to propagate this information to the building outlines. What I am hoping to do is to get the average height of the building outline and get this ...
- 361
0
votes
1
answer
6k
views
Extracting building footprint from OSM or Satellite imagery using QGIS [closed]
I am trying to extract the building footprints from satellite imagery or from OSM using QGIS.
In ArcGIS it is a straightforward task however, I don't know how to do it in QGIS. I need to recognize the ...
- 19
0
votes
1
answer
610
views
Finding building heights/levels for North America
Until recently I have been a blind user of tile maps using Leaflet and one or the other major providers such as Here, MapBox etc. For my current project I find it necessary to have far finer control ...
- 141
0
votes
0
answers
32
views
available data (DSM FIRST, DSM LAST, DTM, BUILDING FOOTPRINT) how to obtain buildings heights?
Lidar data: DSM (First/last) AND DTM are in.ASCII format
Footprint available extracted from OpenStreetMap.
- 11
0
votes
0
answers
72
views
"Heightmap" of the PolygonZ features in QGIS
Let's say I have 3D model of city made from multiPolygonZ features and I need to create black and white image, where each pixel brightness represents height of the building at that coordinate. I need ...
0
votes
1
answer
54
views
QGIS using OSM map layer does not accurately display Safegraph polygon geometry data
Using QGIS, I'm attempting to plot Safegraph Geometry datasets on Open Street Map. What the Safegraph is displaying is purple, whereas the actual polygon, according to the other datasets, is orange. ...
0
votes
0
answers
68
views
What is the UOM of Microsoft Footprint 2017 height data
It says on the website that height's unit of measurement of MSFP 2017 is in meters. However, as I looked into some real building examples on Google Map street view, they height looks very inaccurate (...
- 1
0
votes
1
answer
805
views
Add building height as obstructions to viewshed analysis in ArcGIS Desktop?
I have LAS data. I have made a DEM from the LAS points. I have a Z-enabled polygon feature representing building footprints.
Somehow I need to incorporate the height of the buildings into my DEM so ...
- 15
-1
votes
1
answer
152
views
Roof slope, building footprints,
How to extract flat rooftops from NDSM or DSM using ArcMap? I only have polygons of buildings footprints and DSM and DTM data
- 1