Orthophoto 1975
Data and Resources
Additional Info
| Field | Value |
|---|---|
| Last Updated | May 3, 2023, 01:18 (UTC) |
| Created | May 3, 2023, 01:18 (UTC) |
| GUID | r_lombar:2fde1d01-6314-4dac-ad50-37305cd875c6 |
| access_constraints | ["https://creativecommons.org/licenses/by/4.0/legalcode.it"] |
| bbox-east-long | 11.875772510529002 |
| bbox-north-lat | 46.89581383044163 |
| bbox-south-lat | 44.35998412679428 |
| bbox-west-long | 8.514748593416988 |
| contact-email | sit_rl@regione.lombardia.it |
| coupled-resource | [] |
| dataset-reference-date | [{"type": "revision", "value": "1975-12-31"}] |
| frequency-of-update | asNeeded |
| harvest_object_id | 203588e3-bfe9-41c0-9d25-247b0f3789be |
| harvest_source_id | 5045f9a0-4055-43f6-b140-9cd49466666b |
| harvest_source_title | GeoDatiGovIt RNDT |
| licence | [] |
| lineage | This is a first version of the supply: in fact it has some areas without data (black areas). To make this product, around 11,000 frames of the “ALIFOTO 1975” plane flight were scanned in black/white with an average scale of 1:15,000. The source material is arranged in rolls of negative on transparency film. The entire project area was divided into blocks and aerial triangulation was performed on each individual block, to facilitate calculations and to allow more accurate control of the results. The subdivision into blocks took into account the topography of the terrain, the plane of the analogical flight and, above all, the belonging of the frames to the same roll, to ensure uniformity in the transition from scanning to triangulation, without interruptions or seams, and the subdivision of the product final orthorectified. The scanning of all the negatives took place with a photogrammetric scanner with geometric accuracy of ±2µm and high radiometric performance with a dynamic range of 12bit and a "density range" of 3.4D or greater. The scan was performed at a true optical resolution of 1200dpi, resulting in a pixel size of the digital image of approximately 30cm. Individual scans were saved in 8-bit TIFF format. The orthorectification operation was performed using the Lombardy Region DTM as a digital model of the terrain with a sampling step of 20m. |
| metadata-date | 2022-10-26 |
| metadata-language | ita |
| progress | |
| resource-type | dataset |
| responsible-party | [{"name": "Regione Lombardia", "roles": ["pointOfContact"]}] |
| spatial | {"type": "Polygon", "coordinates": [[[8.514748593416988, 44.35998412679428], [11.875772510529002, 44.35998412679428], [11.875772510529002, 46.89581383044163], [8.514748593416988, 46.89581383044163], [8.514748593416988, 44.35998412679428]]]} |
| spatial-data-service-type | |
| spatial-reference-system | |
| spatial_harvester | true |