Le ortofoto sono un set di dati di foto aeree che coprono l'Estonia.
Un'ortofoto è una foto aerea elaborata da cui vengono rimosse le distorsioni causate
dal rilievo del terreno, dall'inclinazione della fotocamera rispetto al suolo al momento
dell'esposizione e dalla proiezione centrale della fotocamera. Un'ortofoto digitale
ha una determinata dimensione o risoluzione dei pixel che mostra la più piccola
area indivisibile esposta sul terreno (Ground Sampling Distance, GSD).
Le ortofoto hanno una copertura nazionale e corrispondono alla scala di
1:5000-1:10000 (dimensione pixel 20-40 cm). Le ortofoto per le aree densamente popolate
vengono prodotte con dimensioni dei pixel di 10-16 cm.
Il set di dati mono_low_flying ha una singola banda in scala di grigi per
le aree densamente popolate.
I dati sono utilizzabili senza costi per scopi commerciali e non commerciali per un periodo di tempo non specificato, a condizione che venga attribuita la giusta attribuzione al licenziante (ad es. Estonian Land Board) insieme al titolo e all'età dei dati.
Le ortofoto sono un set di dati di foto aeree che coprono l'Estonia. Un'ortofoto è una foto aerea elaborata da cui vengono rimosse le distorsioni causate dal rilievo del terreno, dall'inclinazione della fotocamera rispetto al suolo al momento dell'esposizione e dalla proiezione centrale della fotocamera. Un'ortofoto digitale ha una determinata dimensione o risoluzione dei pixel che…
[null,null,[],[[["\u003cp\u003eThe "Estonia/Maamet/orthos/mono_low_flying" dataset provides orthophotos covering Estonia from 1993 to 2021.\u003c/p\u003e\n"],["\u003cp\u003eOrthophotos are aerial photos geometrically corrected to remove distortions caused by terrain and camera angle.\u003c/p\u003e\n"],["\u003cp\u003eThis dataset focuses on densely populated areas with a resolution of 0.4 meters and a single grayscale band.\u003c/p\u003e\n"],["\u003cp\u003eThe data is free for commercial and non-commercial use with proper attribution to the Estonian Land Board.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset is easily accessible and analyzable through the Google Earth Engine platform.\u003c/p\u003e\n"]]],[],null,["# Estonia mono low flying orthophotos\n\nDataset Availability\n: 1993-01-01T00:00:00Z--2021-06-16T00:00:00Z\n\nDataset Provider\n:\n\n\n [Estonia orthophotos](https://geoportaal.maaamet.ee/eng/Spatial-Data/Orthophotos-p309.html)\n\nTags\n:\n[estonia](/earth-engine/datasets/tags/estonia) [low-flying](/earth-engine/datasets/tags/low-flying) [orthophotos](/earth-engine/datasets/tags/orthophotos) \n\n#### Description\n\nOrthophotos are an aerial photo dataset covering Estonia.\n\nAn orthophoto is a processed aerial photo from which distortions caused\nby terrain relief, camera tilt relative to the ground at the moment of\nexposure and camera central projection are removed. A digital orthophoto\nhas a certain pixel size or resolution which shows the smallest\nindivisible exposed area on the ground (Ground Sampling Distance, GSD).\n\nOrthophotos have a nationwide coverage and correspond to the scale of\n1:5000-1:10000 (pixel size 20-40 cm). Orthophotos for densely-populated\nareas are produced with the pixel size of 10-16 cm.\n\nThe mono_low_flying dataset has a single grayscale band for\ndensely-populated areas.\n\nFor more information, please see the\n[Estonia orthophotos documentation](https://geoportaal.maaamet.ee/eng/Spatial-Data/Orthophotos-p309.html)\n\n### Bands\n\n\n**Pixel Size**\n\n0.4 meters\n\n**Bands**\n\n| Name | Min | Max | Pixel Size | Description |\n|--------|-----|-----|------------|-------------|\n| `mono` | 0 | 255 | meters | Grayscale |\n\n### Terms of Use\n\n**Terms of Use**\n\nThe data is free to use for commercial and non-commercial purposes for a\nnon-specified term, provided that proper attribution is given to the\nlicensor (e.g. Estonian Land Board) along with the title and age of the\ndata.\n\nFor more details please see the\n[Terms of use](https://geoportaal.maaamet.ee/docs/Avaandmed/Licence-of-open-data-of-Estonian-Land-Board.pdf)\n\n### Citations\n\nCitations:\n\n- Map data: Estonian Land Board\n\n### Explore with Earth Engine\n\n| **Important:** Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please [register for Earth Engine access.](https://console.cloud.google.com/earth-engine)\n\n### Code Editor (JavaScript)\n\n```javascript\nvar dataset = ee.ImageCollection('Estonia/Maamet/orthos/mono_low_flying');\nMap.setCenter(24.959, 58.148, 18);\nMap.addLayer(dataset, null, 'Estonia Maamet mono low flying');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/Estonia/Estonia_Maamet_orthos_mono_low_flying) \n[Estonia mono low flying orthophotos](/earth-engine/datasets/catalog/Estonia_Maamet_orthos_mono_low_flying) \nOrthophotos are an aerial photo dataset covering Estonia. An orthophoto is a processed aerial photo from which distortions caused by terrain relief, camera tilt relative to the ground at the moment of exposure and camera central projection are removed. A digital orthophoto has a certain pixel size or resolution which ... \nEstonia/Maamet/orthos/mono_low_flying, estonia,low-flying,orthophotos \n1993-01-01T00:00:00Z/2021-06-16T00:00:00Z \n57.3 21.5 59.5 28.1 \nGoogle Earth Engine \nhttps://developers.google.com/earth-engine/datasets\n\n- [](https://doi.org/https://geoportaal.maaamet.ee/eng/Spatial-Data/Orthophotos-p309.html)\n- [](https://doi.org/https://developers.google.com/earth-engine/datasets/catalog/Estonia_Maamet_orthos_mono_low_flying)"]]
