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Date of Photography: Jun 26, 29, Aug 14 & Sep 16, 22, 2023<\/span><\/span><\/p> Pixel Resolution: 0.10 m<\/span><\/span><\/p> Spectral Bands: RGB Colour & NIR<\/span><\/span><\/p> Airborne Sensor: Vexcel UltraCam Eagle M3<\/span><\/span><\/p> Coordinate System: 3TM 114W NAD83 (EPSG Code 3776)<\/span><\/p> Date Orthophoto Created: 2023<\/span><\/span><\/p> Data Steward Contact: Geospatial Business Solutions division, GBS@Calgary.ca<\/span><\/span><\/p> Horizontal Accuracy :+/-15cm at 95% confidence level on flat ground surfaces. (confirmed with 70+ surveyed ground control points in the original 3TM 114W NAD83 version.)<\/span><\/span><\/p> The orthophoto is a seamless mosaic of accurately positioned aerial images. These aerial images are geometrically corrected for camera perspective and terrain relief so that they have a consistent scale and can be used for direct positional measurements of ground features like a map.<\/span><\/span><\/p> The aerial photo was captured using a fixed wing aircraft equipped with a special aerial camera sensor and high accuracy GNSS/INS positioning systems to gather thousands of overlapping images in a grid pattern across the entire city. These stereo images were accurately geo-referenced and tied together using the airborne and ground control data in a photogrammetric aerial triangulation. The imagery was then orthorectified using the Calgary 2022 LIDAR bare-Earth DEM. <\/span><\/span><\/p> Orthophoto is considered a core geospatial dataset. It is commonly used in many applications such as geospatial analysis, engineering design, City planning, asset management and as a base GIS dataset providing rich contextual information for anywhere in the city. The Calgary orthophoto is updated annually with a city-wide aerial survey flown each spring. <\/span><\/span><\/p> <\/p><\/div><\/div><\/div>",
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"description": " Date of Photography: Jun 26, 29, Aug 14 & Sep 16, 22, 2023<\/span><\/span><\/p> Pixel Resolution: 0.10 m<\/span><\/span><\/p> Spectral Bands: RGB Colour & NIR<\/span><\/span><\/p> Airborne Sensor: Vexcel UltraCam Eagle M3<\/span><\/span><\/p> Coordinate System: 3TM 114W NAD83 (EPSG Code 3776)<\/span><\/p> Date Orthophoto Created: 2023<\/span><\/span><\/p> Data Steward Contact: Geospatial Business Solutions division, GBS@Calgary.ca<\/span><\/span><\/p> Horizontal Accuracy :+/-15cm at 95% confidence level on flat ground surfaces. (confirmed with 70+ surveyed ground control points in the original 3TM 114W NAD83 version.)<\/span><\/span><\/p> The orthophoto is a seamless mosaic of accurately positioned aerial images. These aerial images are geometrically corrected for camera perspective and terrain relief so that they have a consistent scale and can be used for direct positional measurements of ground features like a map.<\/span><\/span><\/p> The aerial photo was captured using a fixed wing aircraft equipped with a special aerial camera sensor and high accuracy GNSS/INS positioning systems to gather thousands of overlapping images in a grid pattern across the entire city. These stereo images were accurately geo-referenced and tied together using the airborne and ground control data in a photogrammetric aerial triangulation. The imagery was then orthorectified using the Calgary 2022 LIDAR bare-Earth DEM. <\/span><\/span><\/p> Orthophoto is considered a core geospatial dataset. It is commonly used in many applications such as geospatial analysis, engineering design, City planning, asset management and as a base GIS dataset providing rich contextual information for anywhere in the city. The Calgary orthophoto is updated annually with a city-wide aerial survey flown each spring. <\/span><\/span><\/p> <\/p><\/div><\/div><\/div>",
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