Lezione master Proidro - Modellazione idrologica con GRASS GIS 17/12/2010
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Transcript of Lezione master Proidro - Modellazione idrologica con GRASS GIS 17/12/2010
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Introduzione all'uso di GRASS GISper la modellazione idrologica
Ing. Margherita Di Leo
Potenza, 17 Dicembre 2010Master PROIDRO - Corso di Modellazione Idrologica
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GRASS = Geographic Resources Analysis Support System
http://grass.fbk.eu/
GIS = Geographic Information System
Open Source Software
Download:http://grass.fbk.eu/download/software.php
Sample data download:http://www.grassbook.org/data_menu3rd.php
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Organization of data
GRASS DATA SET GRASSDATA
LOCATION
MAPSET
UTM33WGS84 UTM33ED50Gauss-
BoagaRoma40FusoEst
PERMANENT PERMANENT PERMANENT
USER1 USER2 USER1 USER1
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North Carolina (NC, USA) data set
Raster, vector and satellite data# Vector data include administrative boundaries, census data, zipcodes, firestations, hospitals, roads and railroads, public schools and colleges, bus routes, points of interest, precipitation, hydrography maps, geodetic points, soils and geological maps.
# Raster data include elevation (NED 3arc-sec, SRTM-V1 30m, lidar derived DEMs at 1m and 6m), slope, aspect, watershed basins, geology, and landuse. The resolution of raster maps is 500m, 30m, 10m, and 1m.
# Imagery data include 1m resolution orthophoto, several LANDSAT-TM5/7 scenes and a MODIS daily Land Surface Temperature (LST) time series.
# Also multiple-return lidar data are included
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GUI (graphical user interface)
Path toGRASS data set
Location
Mapset
Start
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GUI (graphical user interface)
Map Display
Layer Manager
Terminal
Map Layers
Command console
Search module
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GUI (graphical user interface)
Layer Manager
Map LayersCommand console
Search module
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Current region (g.region -p)
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VisualizationAdd raster layerDisplay
Zoom
Query
Coords
Layer
Add raster layer
Show attribute table
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Slope & aspect (r.slope.aspect)
r.slope.aspect elevation=elevation@PERMANENT slope=pendenza aspect=esposizione
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Slope & aspect (r.slope.aspect)
r.slope.aspect elevation=elevation@PERMANENT slope=pendenza aspect=esposizione
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Slope & aspect (r.slope.aspect)
r.slope.aspect elevation=elevation@PERMANENT slope=pendenza aspect=esposizione
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Hydrologic Analysis (r.watershed)
r.watershed elevation=elevation@PERMANENT accumulation=accumuli drainage=drenaggio streams=fiumi threshold=1000
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r.watershed elevation=elevation@PERMANENT accumulation=accumuli drainage=drenaggio streams=fiumi threshold=1000
Hydrologic Analysis (r.watershed)
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r.watershed elevation=elevation@PERMANENT accumulation=accumuli drainage=drenaggio streams=fiumi threshold=1000
Hydrologic Analysis (r.watershed)
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r.watershed elevation=elevation@PERMANENT accumulation=accumuli drainage=drenaggio streams=fiumi threshold=1000
Hydrologic Analysis (r.watershed)
Streams
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r.watershed elevation=elevation@PERMANENT accumulation=accumuli drainage=drenaggio streams=fiumi threshold=1000
Hydrologic Analysis (r.watershed)
Drainage (Flow direction)
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r.watershed elevation=elevation@PERMANENT accumulation=accumuli drainage=drenaggio streams=fiumi threshold=1000
Hydrologic Analysis (r.watershed)
Flow accumulation
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r.thin input=fiumi output=fiumi_thin
Raster to vector map
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r.to.vect input=fiumi_thin output=reticolo feature=line
Raster to vector map
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r.to.vect input=fiumi_thin output=reticolo feature=line
Raster to vector map
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r.to.vect input=fiumi_thin output=reticolo feature=line
Raster to vector map
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Comparison with “real” streams
Layers: Lakes, streams
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Comparison with “real” streams
Layers: Lakes, streams
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Comparison with “real” streams
Layers: Lakes, streams, elevation, fiumi
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Comparison with “real” streams
Layers: Lakes, streams, elevation, fiumi
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Delimitation of the basin (r.water.outlet)
r.water.outlet drainage=drenaggio basin=bacino easting=643677.87 northing=222800.246
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Delimitation of the basin (r.water.outlet)
r.water.outlet drainage=drenaggio basin=bacino easting=643677.87 northing=222800.246
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Delimitation of the basin (r.water.outlet)
r.water.outlet drainage=drenaggio basin=bacino easting=643677.87 northing=222800.246
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Delimitation of the basin (r.water.outlet)
r.water.outlet drainage=drenaggio basin=bacino easting=643677.87 northing=222800.246
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Questions?
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License of this document
This work is licensed under a Creative Commons License. http://creativecommons.org/licenses/bysa/3.0/
2010, Margherita Di Leo, Italy dileomargherita AT gmail DOT com
License details: AttributionShareAlike 3.0:You are free: * to Share — to copy, distribute and transmit the work * to Remix — to adapt the work Under the following conditions: * Attribution — You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work). *Share Alike — If you alter, transform, or build upon this work, you may distribute the resulting work only under the same, similar or a compatible license.
With the understanding that: * Waiver — Any of the above conditions can be waived if you get permission from the copyright holder. * Other Rights — In no way are any of the following rights affected by the license: o Your fair dealing or fair use rights; o The author's moral rights; o Rights other persons may have either in the work itself or in how the work is used, such as publicity or privacy rights.