EuroSDR Projects - Host Ireland

Appendix 5: README File
EuroSDR Test on "Automated Extraction, Refinement, and Update of
Road Databases from Imagery and Other Data"
Objectives of the Test
To thoroughly evaluate the current status of research including
models, strategies, methods and used data, to test and compare
existing semi- or fully automated methods using various data sets
and high quality reference data, to identify weak points, and to
propose strategies and methods that lead to an implementation of
operational procedures for road extraction, update, and refinement.
Test data
8 Test images from different sensors:
-Aerial Images (3)
-Leica ADS40 (2)
-IKONOS (3)
Aerial Images
The given ortho images have a ground resolution of 0.5 m and a size
of 4000 by 4000 pixels. The original images have an image scale of
1:16000, the principal distance of the camera was 0.3 m (normal
angle lens), and they were scanned with a Zeiss SCAI scanner with 14
micrometer pixel size. The ortho-images were generated using an
enclosed (ASCII-format) digital surface model (DSM) with 2 m grid
size generated by image matching (Leica Photogrammetric Suite
including manual elimination of blunders). The images cover an area
close to the city of Thun, Switzerland.
-aerial1 contains a suburban area in hilly terrain
-aerial2 contains a rural scene with medium complexity in hilly
terrain
-aerial3 contains a rural scene with low complexity in hilly terrain
Leica ADS40
The Leica ADS40 is a digital photogrammetric camera with 3
panchromatic and 4 spectral linear CCDs, each with 12,000 pixels and
6.5 microns pixel size. The focal length was 62.5 mm. The images
cover an area close to Waldkirch, Switzerland. The images are
orthoimages (generated with an enclosed, ASCII-format, DTM), have a
ground resolution of 0.2 m and the size of the images is:
-ads40_1: 5800 x 5765 pixels
-ads40_2: 4880 x 5290 pixels
They are an 8 bit version and the original 16 bit version available.
ads40_1 and ads40_2 comprise both rural areas with medium complexity
in flat terrain.
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