User: Jorgejesus

Watershed (2)

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Local machine example

Created: 2012-05-21 | Last updated: 2012-05-21

Credits: Jorgejesus

Ice Class Map pixel analysis (NERSC) (1)

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NERSC ice classification workflow. Avaible images for a specific date will be fecthed from the WPS service, and their color table changed to allow for a user to easly identify specific areas. Statistical analysis also run using the r.stats module. Worflow uses a list of image, the list will flow thru the workflow for process resulting in mutiple outputs

Created: 2011-11-02 | Last updated: 2011-11-02

Credits: Jorgejesus

date filter for ice Class Map service (NERSC) (1)

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Workflow to filter available dates with ice classification images. Service provided by NERCS. Dates are filtered using a simple regular expression

Created: 2011-11-02 | Last updated: 2011-11-04

Credits: Jorgejesus

r.stats workflow for pixel statistics (1)

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r.stats operation for image. Output will group pixels by: DN, total area, relative %. This worflow is used inside the ice Class exampel as a nested workflow

Created: 2011-11-02 | Last updated: 2011-11-02

Credits: Jorgejesus

WPS-GRASS-Bridge r.los example (1)

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r.los generates a raster output map in which the cells that are visible from a user-specified observer position are marked with the vertical angle (in degrees) required to see those cells (viewshed). A value of 0 is directly below the specified viewing position, 90 is due horizontal, and 180 is directly above the observer. The angle to the cell containing the viewing position is undefined and set to 180. http://grass.fbk.eu/grass62/manuals/html62_user/r.los.html

Created: 2011-10-13

Credits: Jorgejesus

Geottif image reprojection (1)

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Example of a WPS service that reprojects a geoTIFF by using a EPSG code. THe example image is in EPSG:32119, lcc projection for north caroline and it comes from GRASS-GIS spearfish dataset. The image is reprojected into EPSG:4326 (lat/long): Metadata: http://rsg.pml.ac.uk/wps/generic.cgi?request=describeProcess&service=wps&identifier=reprojectImage&version=1.0.0 Library: gdalwarp

Created: 2011-09-16 | Last updated: 2011-09-16

Credits: Jorgejesus

Point coordinate projection transformation (1)

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Point coordinate transformation. Hard coded example of transformation from 4326 (lat/long) to 32630 (UTM 30N) for 3 points in the UK. The service is called once at the time, just to test the list interactor, since the service could work with a list of points. Metadata: http://rsg.pml.ac.uk/wps/generic.cgi?request=describeProcess&service=wps&identifier=reprojectCoords&version=1.0.0 Library: gdaltransform

Created: 2011-09-16 | Last updated: 2011-09-16

Credits: Jorgejesus

Voronoi polygon generation using GRASS-GIS... (1)

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Generic example on how to deal with vectorial data. Major pitfall is the need to process ProcessOutputs using Xpath plugin. A random point file in GML 2.1.2 is sent to the v.voronoi service and after it is sent to a service that runs v.out.svg generating a SVG image that can be rendered in Taverna (need to set output to SVG image)

Created: 2011-04-27 | Last updated: 2011-04-27

Credits: Jorgejesus

GRASS-GIS orchestration using pyWPS (2)

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Generic workflow that run r.watershed, with auxiliary services: r.math and geotiff2png. Watershed accumulation is calculated from DEM using r.watershed, the accumulation result is then filtered using r.math with equation:output=(if(a>10,a,null())) Generic workflow that run r.watershed, with auxiliary services: r.math and geotiff2png. Watershed accumulation is calculated from DEM using r.watershed, the accumulation result is then filtered using r.math with equation: output=(if(a>10,...

Created: 2011-04-18 | Last updated: 2011-04-25

Credits: Jorgejesus

WPS orchestration example, image metadata ... (1)

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1 image inputs (GeoTIFF, JPEG,PNG), metadata from gdalinfo and histogram analisys, histogram result is a PNG image in base64 coding (default WPS service encoding) that will be converted to binary.

Created: 2011-03-03 | Last updated: 2011-03-03

Credits: Jorgejesus

[untitled] (1)

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gdalinfo test

Created: 2011-02-27 | Last updated: 2011-02-27

Credits: Jorgejesus

Async WPS example (2)

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Example on how to work with an async service, where the statusURL is used to check for Example on how to work with an async service, where the statusURL is used to check for if the process has finished or not

Created: 2010-11-04 | Last updated: 2011-04-27

Credits: Jorgejesus

Polygon buffer - Using pyWPS (1)

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Basic example on how to integrate a Web Processing Service (WPS) using  PyWPS's WSDL/SOAP The workflow will accept a GML file with featureCollection where polyon is described using gml:coordinate element structure. This GMl is easely generated with GDAL. The coodinate structure will be converted to WKT and used to create a polygon using shapely, the output will be a buffer polygon with a defined width. Output polygon will replace the orginal polygon and the existing XML will be return...

Created: 2010-10-26 | Last updated: 2010-10-26

Credits: Jorgejesus