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organisation |
CNIG
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user_name |
Tiago Oliveira
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user_organisation |
CNIG - Centro Nacional de Informacao Geografica,
Rua Bramcaamp 82 1 - 1200 Lisboa
Portugal
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date |
9/5/1996
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data_set_name |
Digital Terrain Model - 1/25000 - sheet No 209
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data_date |
Fieldwork - 1974
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description |
Digital Terrain Model was produced using a bilinear interpolation
for all contour lines within 10m. The pixel size is 25m
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raster_vector |
RASTER
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filename |
209dtm.img
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software |
Scanning the analogic military sheet.
Editing the contour lines in INTERGRAPH station
Checking possible errors with EDGsubroutine
Planar interpolation for a TIN file structure
Gridding using a bilinear algoritm interpolation
Transformation for IDRISI file format
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formats |
Idrisi (*.img), conversion is possible for several formats
Intergraph (*.grd)
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operating_system |
PC-DOS
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format |
Idrisi raster file format (16bits)
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projection |
Military National Grid System
Gauss projection - International Ellipsoid
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data_quality |
NO
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resolution |
25 m pixel size, 640 pixel per line, 400 lines
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attributes |
altitude, ranging from 0 to 700m
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methods |
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other |
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copyright |
CNIG
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contact |
Tiago Oliveira
tmo@cnig.pt
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