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Task 4 – Proposals and Questions

Task 4 – Proposals and Questions. Combine digital maps and local measurements ARCGIS as easy tool to apply for classification Digital topographic maps are necessary In situ survey of all sitings has to be mandatory

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Task 4 – Proposals and Questions

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  1. Task 4 – Proposals and Questions • Combine digital maps and local measurements • ARCGIS as easy tool to apply for classification • Digital topographic maps are necessary • In situ survey of all sitings has to be mandatory • Without in situ survey the sealing is not possible to determine in a correct way • Interpretation of the definition of classes is not clearly • Regarding 3 circles: „and“ or „or“ relations • Representativeness: within a circle of 500 m, what about coastal sitings or peaks of mountains?

  2. Howtoexecutethe CIMO-classification in DWD (Germany) Laserlocater Digital terrainmodel Georeferencedmaps /aerialphotographs Geographicalinformationsystem Obstacles Shadowingeffects Lakes, sealingareas… Natural horizonshadowing

  3. Heat-sources in Surface

  4. Point-Cloud from digital-terrain-system with 10m accuracy

  5. Air Temperature an Humidity - Class 1 • “A source of heat (or expanse of water) is considered to have an impact if it occupies more than 10% of the surface within a circular radius of 100 m surrounding the screen, makes up 5% of an annulus of 10-30 m, or covers 1% of a 10 m radius area.“ (WMO-No. 8) • For discussion • It’s parameter class 1, if heat sources and expanse of water occupy • less than 10 % in a circular radius of 100 m (= 3142 m²) and • less than 5 % in an annulus of 10-30 m (= 126 m²) and • less than 1 % of a 10 m radius area (= 3,1 m²).

  6. Air Temperature an Humidity - Class 2 • “A source of heat (or expanse of water) is considered to have an impact if it occupies more than 10% of the surface within a radius of 30 m surrounding the screen, makes up 5% of an annulus of 5-10 m, or covers 1% of a 5 m radius area.“ (WMO-No. 8) • For discussion • It’s parameter class 2, if heat sources and expanse of water occupy • less than 10 % in a circular radius of 30 m (= 283 m²) and • less than 5 % in an annulus of 5-10 m (= 12 m²) and • less than 1 % of a 5 m radius area (= 0,8 m²).

  7. Air Temperature an Humidity - Class 3 • “A source of heat (or expanse of water) is considered to have an impact if it occupies more than 10% of the surface within a radius of 10 m surrounding the screen or makes up 5% of a 5 m radius area.“ (WMO-No. 8) • For discussion • It’s parameter class 3, if heat sources and expanse of water occupy • less than 10 % in a circular radius of 10 m (= 31 m²) and • less than 5 % of a 5 m radius area (= 4 m²).

  8. Representativeoftherelief “A method to judge if the relief is representative of the surrounding area is the following: Does a move of the station by 500 m change the class obtained?“ (WMO No. 8) How do you solve it practically? Tell it in steps. Examples: Sites on the peak of a mountain or on the beach or coast.

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