add disclaimer for rooftop characterisation

[Patrick1G]

The aerial imagery used by DLR to map green roofs and PV panels on roofs are not the same aerial imagery that is visible in the GTIF demonstrator tool as orthophoto basemap.

There has been various complaints about the quality of the DLR product, but largely this is due to discrepancies of aerial imagery data sources. We need a prominent disclaimer that clarifies this issue..

[santilland]

@FranLeonelli or @Patrick1G could you specify what wording should be used where for this?
Please also feel free to create a change request for these files directly as a more direct change:
https://github.com/eurodatacube/eodash-assets/blob/main/collections/SOL2_1_Solar_Roofs_pv_existing/SOL2_1.md
https://github.com/eurodatacube/eodash-assets/blob/main/collections/SOL2_2_Solar_Roofs_regular_performance/SOL2_2.md
https://github.com/eurodatacube/eodash-assets/blob/main/collections/SOL2_3_Solar_Roofs_low_performance/SOL2_3.md
https://github.com/eurodatacube/eodash-assets/blob/main/collections/SOL2_Solar_Roofs_high_performance/SOL2.md

and for green roofs:
https://github.com/eurodatacube/eodash-assets/blob/main/collections/SOL1_1_Green_Roofs_lst/SOL1_1.md
https://github.com/eurodatacube/eodash-assets/blob/main/collections/SOL1_2_Green_Roofs_grexisting/SOL1_2.md
https://github.com/eurodatacube/eodash-assets/blob/main/collections/SOL1_3_Green_Roofs_grpotential/SOL1_3.md
https://github.com/eurodatacube/eodash-assets/blob/main/collections/SOL1_4_Green_Roofs_grpotrelation/SOL1_4.md
https://github.com/eurodatacube/eodash-assets/blob/main/collections/SOL1_5_Green_Roofs_co2red_05/SOL1_5.md
https://github.com/eurodatacube/eodash-assets/blob/main/collections/SOL1_6_Green_Roofs_co2red_20/SOL1_6.md
https://github.com/eurodatacube/eodash-assets/blob/main/collections/SOL1_7_Green_Roofs_co2red_45/SOL1_7.md
https://github.com/eurodatacube/eodash-assets/blob/main/collections/SOL1_Green_Roofs_grimpactscore/SOL1.md

[santilland]

Following disclaimer has been provided:

Please note:

In order to detect and calculate the potential of solar and green roofs, the most up-to-date (at the time of the project) Digital Orthophotos (DOP, with a 20 cm spatial resolution) and Digital Surface Models (DOM, with a 1 m spatial resolution) have been provided by the Austrian Federal Ministry of Agriculture, Forestry, Regions and Water Management (BML) through the Earth Observation Data Centre GmbH (EODC).

 

The Geoland Basemap Orthophoto which are included in GTIF as a basemap to support visual analysis and qualitative assessment do not correspond to the same date of the arial imaging campaign mentioned above. Due to this lack of temporal correspondence between the aerial imagery, some discrepancies exist which are however not a shortcoming of the methods employed.