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Terrain

Terrain map

The Terrain multiresolution layer provides access to elevation values for use in analysis with functions for slope, aspect, and hillshade.

Service Name: Terrain

Description

This dynamic image service provides numeric values representing ground surface heights, based on a digital terrain model (DTM). The ground heights are based on multiple sources. Heights are orthometric (sea level = 0), and water bodies that are above sea level have approximated nominal water heights.

This layer is generally not optimal for direct visualization. By default, 32-bit floating point values are returned, resulting in higher bandwidth requirements. Therefore, usage should be limited to applications requiring elevation data values. Alternatively, client applications can select from numerous additional functions, applied on the server, that return rendered data. For visualizations such as hillshade, elevation tinted hillshade, and slope, consider using the appropriate server-side function defined on this service.

Server functions

This layer has server functions defined for the following elevation derivatives:

  • Slope Degrees
  • Slope Percentage
  • Aspect
  • Ellipsoidal Height
  • Hillshade
  • Multi-Directional Hillshade
  • Elevation Tinted Hillshade
  • Slope Map
  • Aspect Map

Data sources

The data for this layer comes from the multiple sources listed below, with original source data in its native coordinate system. Depending on the scale being viewed, data from one of these datasets will be returned.

Data Source native pixel sizeApproximate pixel size (meters)Coverage Primary sourceCountry/Region

Australia 1m

1 meter

1

Partial areas of Australia

Geoscience Australia

Australia

Moreton Bay, Australia 1m

1 meter

1

Moreton Bay region, Australia

Moreton Bay Regional Council

Australia

SRTM 1 arc second DEM-S

0.0002777777777779 degrees

31

Australia

Geoscience Australia

Australia

Upper Austria 50cm

0.5 meters

0.5

Upper Austria State, Austria

Land Oberosterreich

Austria

Vienna City 1m

1 meter

1

Vienna city, Austria

City of Vienna

Austria

Salzburg 1m

1 meter

1

Salzburg State, Austria

Land Salzburg

Austria

Carinthia 5m

5 meters

5

Carinthia State, Austria

Land Carinthia

Austria

Salzburg 5m

5 meters

5

Salzburg State, Austria

Land Salzburg

Austria

Tyrol 5m

5 meters

5

Tyrol State, Austria

Land Tyrol

Austria

Vorarlberg 5m

5 meters

5

Vorarlberg State, Austria

Land Vorarlberg

Austria

Austria 10m

10 meters

10

Austria

Geoland

Austria

Canada HRDEM 1m

1 meter

1

Partial areas of the southern part of Canada

Natural Resources Canada

Canada

Denmark 3m

3.2 meters

3

Denmark

Geodatastyrelsen

Denmark

Denmark 10m

10 meters

10

Denmark

Geodatastyrelsen

Denmark

England 2m

2 meters

2

70 percent of England

Environment Agency

England

Estonia 1m

1 meter

1

Estonia

Estonian Land Board

Estonia

Estonia 5m

5 meters

5

Estonia

Estonian Land Board

Estonia

Estonia 10m

10 meters

10

Estonia

Estonian Land Board

Estonia

Finland 3m

3 meters

3

Partial areas of Finland

NLS

Finland

Finland 10m

10 meters

10

Finland

NLS

Finland

Nordrhein-Westfalen 1m

1 meter

1

Nordrhein-Westfalen State, Germany

Land NRW

Germany

Japan DEM5A, DEM5B

0.000055555555 degrees

5

Partial areas of Japan

GSI

Japan

Japan DEM10B

0.00011111111 degrees

10

Japan

GSI

Japan

Latvia 1m

1 meter

1

Latvia

Latvian Geospatial Information Agency

Latvia

Latvia 10m

10 meters

10

Latvia

Latvian Geospatial Information Agency

Latvia

Latvia 20m

20 meters

20

Latvia

Latvian Geospatial Information Agency

Latvia

Lithuania 1m

1 meter

1

Lithuania

NZT (www.nzt.lt/)

Lithuania

Lithuania 10m

10 meters

10

Lithuania

NZT (www.nzt.lt/)

Lithuania

Netherlands (AHN2) 3m

3 meters

3

Netherlands

Rijkswaterstaat

Netherlands

Norway 10m

10 meters

10

Norway

NMA

Norway

Scotland 1m

1 meter

1

Partial areas of Scotland

Scottish Government et.al

Scotland

Slovakia 10m

10 meters

10

Slovakia

GKÚ (www.gku.sk/gku)

Slovakia

Madrid City 1m

1 meter

1

Madrid city, Spain

Ayuntamiento de Madrid

Spain

Spain 2m (MDT02 2019 CC-BY 4.0 scne.es)

2 meters

2

Partial areas of Spain

IGN

Spain

Spain 5m

5 meters

5

Spain

IGN

Spain

Spain 10m

10 meters

10

Spain

IGN

Spain

Varnamo 50cm

0.5 meters

0.5

Varnamo municipality, Sweden

Värnamo Kommun

Sweden

Canton of Basel-Landschaft 25cm

0.25 meters

0.25

Canton of Basel-Landschaft, Switzerland

Geoinformation Kanton Basel-Landschaft

Switzerland

Canton of Aargau 50cm

0.5 meters

0.5

Canton of Aargau, Switzerland

Aargauische Geografische Informationssystem

Switzerland

Canton of Solothurn 50cm

0.5 meters

0.5

Canton of Solothurn, Switzerland

Geoinformation Kanton Solothurn

Switzerland

Canton of Zurich 50cm

0.5 meters

0.5

Canton of Zurich, Switzerland

Geoinformation Kanton Zürich

Switzerland

Grand Geneva 50cm

0.5 meters

0.5

Grand Geneva metropolitan, France/Switzerland

SITG

Switzerland and France

OS Terrain 50

50 meters

50

United Kingdom

Ordnance Survey

United Kingdom

NRCS 1m

1 meter

1

Partial areas of the conterminous United States

NRCS USDA

United States

3DEP 1m

1 meter

1

Partial areas of the conterminous United States, Puerto Rico

USGS

United States

FEMA LiDAR DTM

3 meters

3

Partial areas of the conterminous United States

FEMA

United States

NED 1/9 arc second

0.000092592592593 degrees

10

Partial areas of the conterminous United States

USGS

United States

3DEP 5m

5 meters

5

Alaska, United States

USGS

United States

NED 1/3 arc second

0.000092592592593 degrees

10

Conterminous United States, Hawaii, partial Alaska, and territorial islands of the United States

USGS

United States

NED 1 arc second

0.0002777777777779 degrees

31

Conterminous United States, Hawaii, partial Alaska, Puerto Rico, territorial islands of the United States, Canada and Mexico

USGS

United States

NED 2 arc second

0.000555555555556 degrees

62

Alaska, United States

USGS

United States

Wales 2m

2 meters

2

70 percent of Wales

Natural Resources Wales

Wales

WorldDEM4Ortho

0.00022222222 degrees

24

Global (excluding the countries of Azerbaijan, DR Congo and Ukraine)

Airbus Defense and Space GmbH

World

SRTM 1 arc second

0.0002777777777779 degrees

31

All land areas between 60 degrees north and 56 degrees south except Australia

NASA

World

SRTM v4.1

0.00083333333333333 degrees

93

All land areas between 60 degrees north and 56 degrees south except Australia

CGIAR-CSI

World

EarthEnv-DEM90

0.00083333333333333 degrees

93

Global

N Robinson,NCEAS

World

GMTED2010 7.5 arc second

0.00208333333333333 degrees

232

Global

USGS

World

GMTED2010 15 arc second

0.00416666666666666 degrees

464

Global

USGS

World

GMTED2010 30 arc second

0.0083333333333333 degrees

928

Global

USGS

World

For more information, see Use the World Elevation services.

Mosaic method

This image service uses a default mosaic method of By Attribute, using Field Best and target of 0. Each of the rasters has been attributed with Best field value that is generally a function of the pixel size such that higher-resolution datasets are displayed at higher priority. Other mosaic methods can be set, but care should be taken because the order of the rasters may change. Where required, queries can also be set to display only specific datasets, such as only NED, or the lock raster mosaic rule used to lock to a specific dataset.

Accuracy

The accuracy of these services will vary as a function of location and data source. Refer to the metadata available in the services, and follow the links to the original sources for further details. Estimates of CE90 and LE90 are included as attributes.

Attribution

Sources: USGS, NGA, NASA, CGIAR, NLS, OS, NMA, Geodatastyrelsen, GSA, GSI and the GIS User Community

Coverage

The following coverage map illustrates the coverage of the layer:

World Elevation coverage (Terrain)