Bernd Münier (DMU):
Landskabsmodeller i terrestriske biotoper - naturgrundlag
og historisk arealanvendelse
Overview of software and spatial data used for data
preparation and modelling:
GIS-software: ArcView 3.1 on WinNT and Win95.
Map database: Implemented into a raster data
model. Table 1 gives an overview of data-sources and how
they have been combined to reflect physiotope variables and
types of management.
|
Ecotope variable
|
Main data-sources
|
Organisation
|
Scale/
grid
|
Source data R/V
|
|
Moisture regime
|
Quaternary geology
Soil texture
Hydrosoil areas
|
GEUS
DJF
DJF/DMU
|
1:25.000
1:50.000
1:25.000
|
V
V
V
|
|
Littoral zones
|
Coast line
Nature types (salt marshes)
|
KMS
Counties
|
1:25.000
1:25.000
|
V
V
|
|
Topography
|
Elevation model
|
KMS
|
25 m
|
R
|
|
Slope
|
Elevation model
|
KMS
|
25 m
|
R
|
|
Soil type
|
Quaternary geology
Soil texture
Hydrosoil areas
|
GEUS
DJF
DJF/DMU
|
1:25.000
1:50.000
1:25.000
|
V
V
V
|
|
Salinity
|
Coast line
Nature types (salt marshes)
|
KMS
Counties
|
1:25.000
1:25.000
|
V
V
|
|
Vegetation structure
|
Land cover inventory from TM satellite-images
|
DMU-AIS
|
25 m
|
R
|
|
Past and present land use (entire area)
|
Topographic maps 1987
Nature types 1987 and 1996
|
KMS scanned
SNS/Counties
|
2 m
1:25.000
|
R
V
|
|
Past and present land use (subarea only)
|
Topographic maps 1868, 1909, 1950
Topographic maps 1987
Nature types 1987 and 1996
|
Own digitising
KMS scanned
SNS/Counties
|
1:20.000
2 m
1:25.000
|
V
R
V
|
Table 1: Primary data sets used for input to the
model database, the main data sources and their original
scale and format.
Most of the input maps for generating the basic data
layers for the model were vector maps in scale 1:25.000 and
had to be converted to raster format. A grid size of 10 m
was used to preserve minor areas and narrow, almost linear
features as bottoms of valleys and salt marshes. In the
modelling step an output resolution of 25 x 25 m grids is
used to cut down processing time, but grid size can easily
be redefined by the user if desirable.
|
