Ortofotomapy to zbiór zdjęć lotniczych obejmujący Estonię.
Ortofotomapa to przetworzone zdjęcie lotnicze, z którego usunięto zniekształcenia spowodowane ukształtowaniem terenu, pochyleniem kamery względem ziemi w momencie ekspozycji i projekcją środkową kamery. Ortofotomapa cyfrowa ma określony rozmiar piksela lub rozdzielczość, która pokazuje najmniejszy niepodzielny obszar na ziemi (odległość próbkowania terenu, GSD).
Ortofotomapy obejmują cały kraj i odpowiadają skali 1:5000–1:10000 (rozmiar piksela 20–40 cm). Ortofotomapy dla gęsto zaludnionych obszarów są tworzone z rozmiarem piksela 10–16 cm.
Zbiór danych RGB ma 3 pasma o zasięgu ogólnokrajowym: czerwone, zielone i niebieskie.
Dane można bezpłatnie wykorzystywać do celów komercyjnych i niekomercyjnych przez nieokreślony czas, pod warunkiem podania odpowiedniego atrybutu licencjodawcy (np. Estonian Land Board) wraz z tytułem i datą danych.
Ortofotomapy to zbiór zdjęć lotniczych obejmujący Estonię. Ortofotomapa to przetworzone zdjęcie lotnicze, z którego usunięto zniekształcenia spowodowane ukształtowaniem terenu, pochyleniem aparatu względem ziemi w momencie ekspozycji i projekcją środkową aparatu. Ortofotomapa cyfrowa ma określony rozmiar piksela lub rozdzielczość, która…
[null,null,[],[[["\u003cp\u003eThe Estonia RGB orthophotos dataset provides aerial imagery of Estonia from 1993 to 2021 with a resolution of 0.4 meters.\u003c/p\u003e\n"],["\u003cp\u003eOrthophotos are processed to remove distortions caused by terrain and camera angles, resulting in accurate representations of the ground.\u003c/p\u003e\n"],["\u003cp\u003eThe dataset covers the entire country with varying pixel sizes (10-40 cm) depending on population density.\u003c/p\u003e\n"],["\u003cp\u003eRGB bands (red, green, blue) provide natural color representation for visualization and analysis.\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"]]],["The dataset contains Estonia's aerial orthophotos from 1993-01-01 to 2021-06-16, provided by the Estonian Land Board. These processed photos, free for commercial and non-commercial use with attribution, have nationwide coverage. Data is available in RGB format (Red, Green, Blue), with pixel sizes ranging from 10-40 cm. Access and visualization are possible via Google Earth Engine using the `ee.ImageCollection(\"Estonia/Maamet/orthos/rgb\")` code snippet. The data includes three bands representing the red, green and blue color.\n"],null,["# Estonia RGB 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) [orthophotos](/earth-engine/datasets/tags/orthophotos) [rgb](/earth-engine/datasets/tags/rgb) \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 RGB dataset has three bands with nationwide coverage: red, green, and\nblue.\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| `R` | 0 | 255 | meters | Red |\n| `G` | 0 | 255 | meters | Green |\n| `B` | 0 | 255 | meters | Blue |\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/rgb');\nMap.setCenter(24.959, 58.148, 18);\nMap.addLayer(dataset, null, 'Estonia Maamet rgb');\n```\n[Open in Code Editor](https://code.earthengine.google.com/?scriptPath=Examples:Datasets/Estonia/Estonia_Maamet_orthos_rgb) \n[Estonia RGB orthophotos](/earth-engine/datasets/catalog/Estonia_Maamet_orthos_rgb) \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/rgb, estonia,orthophotos,rgb \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_rgb)"]]
