Download high precision XYZ data

The Download is powered by the GIScience Research Group of the University of Heidelberg gissciense

If you have any high precision XYZ data which could be licensed under a free license please donate it to the project.

The RMS error must be equal or smaller than 3 meters. The values should be comma separated (.csv) or in the case of a Raster in the Geo Tiled Image File Format (.tif).

The data should be supplied in the original reference system. Coordinate Transformations could be very tricky, but height value transformation is even much more complicated because it is not yet supported by free software packages. Therefore the dataset should be provided in the original reference system and the user could decide how to transform the data.

Free GIS software like Quantum GIS could easily import the data (delimited text file plugin), visualise and reproject it. Reprojections could be done with different free software packages like FWTools, GRASS and PostGIS. All the above mentioned software is based on the Proj4 library, a free Projection library. Please be aware that the result of a transformation could differ from other GIS software which is not based on Proj4, even with the same ESPGs!

The data could be visualised in 3D with the Virtual Terrain Software.

The data could be downloaded under the Open Database License.

It is essential that metadata is provided with information about the quality of the dataset (see template below).

Dataset Name

Name of the dataset (Name of the region or place)

Type XYZ or Raster, terrain or surface

xmin

Xmin coordinate

xmax

Xmax coordinate

ymin

Ymin coordinate

ymax

Ymax coordinate

ESPG

ESPG code of the reference system

Height Reference

Reference system of the height values

RMS error (vertical)

Vertical RMS error

RMS error (horizontal)

Horizontal RMS error

Remarks

Additional remarks for the dataset

Supplier

Contact information of the supplierĀ 

 

Download Data:

Dataset Name

City of Rostock_Germany

Type xyz, terrain

xmin

12.0274

xmax

12.1961

ymin

54.0529

ymax

54.1908

ESPG

4326

Height Reference

-

RMS error (vertical)

< 1.5 m

RMS error (horizontal)

< 1.5 m

Remarks

High Resolution Stereo Camera, Flight in 2002, Corrected 2005 by the University of Rostock, No Parameters for the RMS error are available but the precision should be about < 1 m (horizontal & vertical). Only coordinates of the buildings, not a sufficent model.

Supplier

Kataster-, Vermessungs- und Liegenschaftsamt Rostock (Emergency planning, surveying and land registration department, Rostock)

 

Dataset Name

Gaeta_Italy

Type xyz, terrain

xmin

2388687.00

xmax

2406088.00

ymin

4561964.00

ymax

4572864.00

ESPG

3004

Height Reference

-

RMS error (vertical)

3.0 m

RMS error (horizontal)

3.0 m

Remarks

Suficent DTM

Supplier

exporttocanoma@gmail.com

 

 

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