Questions tagged [building-heights]

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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.
Amro Attia's user avatar
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0 answers
70 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 ...
Matyas M. Svejdik's user avatar
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1 answer
53 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. ...
Negin Zarbakhsh's user avatar
3 votes
0 answers
679 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 ...
essexboyracer's user avatar
-1 votes
1 answer
147 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
Lyraaaa's user avatar
1 vote
0 answers
295 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 ...
anna's user avatar
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1 vote
0 answers
73 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 ...
Topow's user avatar
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1 answer
5k 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 ...
Tareq Salim's user avatar
0 votes
1 answer
599 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 ...
DroidOS's user avatar
  • 141
3 votes
0 answers
992 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 ...
Lynx's user avatar
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1 vote
2 answers
292 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 ...
Rookie Ola's user avatar
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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 (...
Bill's user avatar
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4 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 ...
Lion Lai's user avatar
  • 248
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 ...
George's user avatar
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7 votes
1 answer
880 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 ...
MartinMap's user avatar
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1 vote
1 answer
340 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....
user132986's user avatar
0 votes
1 answer
793 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 ...
user105446's user avatar
1 vote
1 answer
401 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 ...
N Dawson's user avatar
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?
Black_panther's user avatar
1 vote
1 answer
278 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 ...
terauser's user avatar
1 vote
2 answers
414 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 ...
Richard Vijgen's user avatar
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 ...
Mauro's user avatar
  • 39
4 votes
1 answer
244 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 ...
Henrique Reis's user avatar
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 ...
Hajar Elhammouti's user avatar
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 ...
ProudGIS's user avatar
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