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Harmonization of Soil Information in the Alps Technical and Operational Procedures

Harmonization of Soil Information in the Alps Technical and Operational Procedures. Swiss-Italian ECALP Pilot Area. Stefano Brenna, Alberto Rocca ERSAF – Agency for Agriculture and Forests - Lombardy. Ispra, 3-4 February 2005. Swiss-Italian ECALP pilot area Lombardy - “state of art”.

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Harmonization of Soil Information in the Alps Technical and Operational Procedures

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  1. Harmonization of Soil Information in the Alps Technical and Operational Procedures Swiss-Italian ECALP Pilot Area Stefano Brenna, Alberto Rocca ERSAF – Agency for Agriculture and Forests - Lombardy Ispra, 3-4 February 2005

  2. Swiss-Italian ECALP pilot areaLombardy - “state of art” topics • cartographic issues • exchange format • first results • workplan

  3. Cartographic issues - Swiss-Italian Pilot Area ECALP GIS Layer:administrative boundaries and lakes Coordinate system:ETRS-LAEA

  4. Projection to Lambert coordinate system ERSAF GIS Layers:soil and land use maps(scale 1:250.000) coordinate system:origin:Gauss-Boaga Westdestination:ETRS_LAEA DATUM transformationED_1950 to WGS_1984_1 Result of spatial overlay of ERSAF GIS layer with ECALP GIS layer:

  5. Geometric incongruity of the maps at the Swiss-Italian border Possible situations for “shared” pixels 1 over information 2 lack of information 3 both over and lack of information 4 no information (in theory)

  6. Grid transformation in Gauss-Boaga West coordinate system ECALP GIS layer: alpine 1k grid coordinate system:origin:ETRS_LAEAdestination: Gauss-Boaga West • grid is not perfectly squared • grid cells sides are segmented • grid cells area: 0,9992 km2 • comparing the percentage of cell occupied by SMU • in Lambert and Gauss-Boaga West coordinate system: • difference between the two cases fits a Gaussian distribution: mean value 0,08 km2 and standard deviation 6,4 km2; • no perfect equivalence: error is often relevant (up to 16 %)

  7. Exchange format ver. 6.2 comments and remarks AGRI-USE Which uses are considered agricultural uses? AGLM1.AGLM2 Other limitations, often more relevant for agriculture, can occur, such as slope gradient, slope shape, climate, … AGLM could be identify as “pedological limitation to agricultural use”. TEXT-TOP-SEC • In the Lombardy soil database: • only modal attributes of STU are usually formalised:secondary information is not available. • texture classes proposed are rather wide:soils having so different textures belong to different STU.

  8. Exchange format ver. 6.2 WM1, WM2 Information not available because it is not an attribute of STU (information more related to “land” than to “soil”) PX-OBSPX-NPROF Information accuracy in the pixel depends on the scale of the soil survey carried out in the area and not on the number of soil observations.

  9. First results Source of data: land use map (DUSAF) SUR-BARE, SUR-URB, W-Body, STU-TOT soil map (scale 1:250.000) other parameters Swiss-Italian Pilot area Soil Regions

  10. First results Land Use WRB Soil Reference Groups

  11. Support tools • provided:method to identify the dominant STU occurring in the pixels by means of Microsoft Access database query • under construction: • web utility to get the possibility to see “grid maps” and data stored in the pixel

  12. method to identify the dominant STU

  13. Work plan Next steps – ECALP Pilot Area • Integrating Swiss experience and contribution • Assessing geometric incongruity at the border • Identifying rules for shared pixels • Filling the database • Field excursion: 17-18th of February (to be confirmed) • For the future: • INTERREG project (?)

  14. Thanks for your attention!

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