GeoTIFF Overlay: Difference between revisions

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The Geotiff [[Overlay]] is a [[Grid overlay]] which displays the values of a selected [[GeoTiff]] in the [[3D world]]. It is commonly used to display grid data loaded into the [[Project]] from outside the {{software}} as is, or to show how such a dataset is rasterized as part of usage in calculation models, such as the [[Water Overlay]] or the [[Heat Overlay]].
[[File:Geotiff overlay.jpg|right|thumb|400px|A GeoTIFF Overlay, where the data of a GeoTIFF is displayed.]]
The [[GeoTIFF Overlay]] is a [[Grid overlay]] which displays the values of a selected [[GeoTIFF]] in the [[project area]]. It is commonly used to display raster data imported into the [[Project]] from outside the {{software}}.


==Additional information displayed in hover panel==
==Additional information displayed in hover panel==
When clicking on a specific location in the map of the Geotiff Overlay, the hover panel gives additional information over the actual value in that specific grid cell.That value will be an interpolation, determined by the translation between the source file's grid, and the rasterized grid in the 3D world.
When clicking on a specific location in the map of the GeoTIFF Overlay, the hover panel gives additional information over the actual value in that specific grid cell. That value will be an interpolation, determined by the translation between the source file's resolution and the [[Grid_Overlay#Grid_size|grid cell size]].


==How-to's==
==GeoTIFF sources==
* [[How-to add and remove an overlay]]
The GeoTIFF Overlay can show [[GeoTIFF]]s which are uploaded to the [[Project]] as an [[asset]] and data of that asset is stored as a GeoTIFF [[item]]. Any number of [[GeoTIFF]]s can be added to a GeoTIFF Overlay, with each [[GeoTIFF]] defining an individual [[timeframe]] in the  GeoTIFF Overlay.
* [[How-to edit an overlay legend]]
* [[How to select a GeoTiff]]
* [[How to update an existing GeoTiff]]


{{Template:Overlay nav}}
==Color RGB==
By default the first band (or channel) in a GeoTIFF is selected resulting in a 32-bit result of for example a height map.
 
It is however also possible to select a different band via the [[Band (GeoTIFF Overlay)|BAND]] attribute. This way you can also load in (Aerial{{ref|Aerial}}) color images. Start by creating 3 GeoTiff Overlays for the R channel (BAND=0), G channel (BAND=1) and B channel (BAND=2), then combine these in a [[Combo Overlay]] via the <code>COLOR(R,G,B)</code> formula. The result will show a color image.
 
{{overlay attributes|suppresscategory=true|allowselflinks=true|
  {{:Band (GeoTIFF Overlay)}}
}}
 
{{article end
|howtos=
* [[How to add and remove an Overlay]]
* [[How to edit an overlay legend]]
* [[How to select a GeoTIFF for a GeoTIFF Overlay]]
* [[How to update an existing GeoTIFF]]
* [[How to fix a GeoTIFF that has an invalid NO_DATA value]]
|seealso=*[[GeoTIFF]]
*[[WCS Overlay]]
|references=
<references>
{{ref|Aerial
  |name=NL Aerial Imagery
  |author=
  |page=
  |source=
  |link=https://basisdata.nl/hwh-portal/download/index.html
  |lastvisit=2025-10-28
}}
</references>
}}
 
{{Overlay nav}}
[[Category:GeoTIFF]][[Category:Overlay]]

Latest revision as of 16:04, 28 October 2025

A GeoTIFF Overlay, where the data of a GeoTIFF is displayed.

The GeoTIFF Overlay is a Grid overlay which displays the values of a selected GeoTIFF in the project area. It is commonly used to display raster data imported into the Project from outside the Tygron Platform.

Additional information displayed in hover panel

When clicking on a specific location in the map of the GeoTIFF Overlay, the hover panel gives additional information over the actual value in that specific grid cell. That value will be an interpolation, determined by the translation between the source file's resolution and the grid cell size.

GeoTIFF sources

The GeoTIFF Overlay can show GeoTIFFs which are uploaded to the Project as an asset and data of that asset is stored as a GeoTIFF item. Any number of GeoTIFFs can be added to a GeoTIFF Overlay, with each GeoTIFF defining an individual timeframe in the GeoTIFF Overlay.

Color RGB

By default the first band (or channel) in a GeoTIFF is selected resulting in a 32-bit result of for example a height map.

It is however also possible to select a different band via the BAND attribute. This way you can also load in (Aerial[1]) color images. Start by creating 3 GeoTiff Overlays for the R channel (BAND=0), G channel (BAND=1) and B channel (BAND=2), then combine these in a Combo Overlay via the COLOR(R,G,B) formula. The result will show a color image.

Icon Attribute Unit Range Description Default value
File:Band.png BAND number 0 to 4 Select a specific band in the GeoTIFF 0 (first band)

How-to's

See also

References

  1. ↑ NL Aerial Imagery ∙ Found at: https://basisdata.nl/hwh-portal/download/index.html ∙ (last visited: 2025-10-28)
Overlays
Categorization
Grid • Parent • Result Child • Result Parent • Result type
Default
City
Administrative
Ownership • Ownership Grid • Zipcodes • Zoning • Neighborhoods • Municipalities • Scenario
Environmental
Heat Stress • Shadow • Traffic Density • Traffic Noise • Traffic NO2 • Livability
Water
Rainfall • Flooding • Groundwater • Watershed
Grid Calculation
Average • Combo • Distance • Sight Distance • Travel Distance • Inference • Iteration
Geo Data
GeoTIFF • WCS • WMS • Image • Area • Attribute • Function
Topography
Satellite • Digital Surface Model • Digital Terrain Model • Building Floors • Underground • Source
Network
Network Distance • Network Overview • Network Ownership
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