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snippet:
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Calgary 2024 Aerial Orthophoto Mosaic |
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summary:
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Calgary 2024 Aerial Orthophoto Mosaic |
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accessInformation:
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City of Calgary |
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thumbnail:
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thumbnail/thumbnail.JPEG |
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maxScale:
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5000.0 |
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typeKeywords:
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["Data","Service","Image Service","ArcGIS Server"] |
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description:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Date of Photography: June 11, 20, July 20 & August 29, 2024</SPAN></P><P><SPAN>Date Orthophoto Created: 2024</SPAN></P><P><SPAN>Pixel Resolution: 0.10m</SPAN></P><P><SPAN>Spectral Bands: RGB Colour & NIR</SPAN></P><P><SPAN>Airborne Sensor: Leica DMCIII</SPAN></P><P><SPAN>Coordinate System: 3TM 114W NAD83 (EPSG Code 3776)</SPAN></P><P><SPAN>Data Steward Contact: Geospatial Business Solutions division, GBS@Calgary.ca</SPAN></P><P><SPAN>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></P><P><SPAN>The 2024 mosaic includes additional coverage around the Springbank airport in Rocky View County. </SPAN></P><P><SPAN>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></P><P><SPAN>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></P><P><SPAN>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></P></DIV></DIV></DIV> |
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licenseInfo:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>COPYRIGHT © The City of Calgary, 2024</SPAN></P><P><SPAN>All rights reserved. No part of this propriety product may be reproduced in any form or by any means without the written consent of The City of Calgary and a license agreement. The City of Calgary provides this geospatial data in good faith, but provides no warranty, nor accepts any liability arising from incorrect, incomplete or misleading information or its improper use. In no event will The City be liable for any incidental, indirect, punitive, exemplary or consequential damages whatsoever in connection with any claim arising out of the use of this product. </SPAN></P></DIV></DIV></DIV> |
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catalogPath:
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title:
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CurrentOrthophoto |
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type:
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Image Service |
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url:
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tags:
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["Calgary","orthophoto","2024","ortho","aerial","imagery","air photo","3TM","Alberta","Rocky View","CYYC","CYBW","Springbank"] |
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culture:
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en-CA |
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name:
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CurrentOrthophoto |
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guid:
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minScale:
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1.5E8 |
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spatialReference:
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WGS_1984_Web_Mercator_Auxiliary_Sphere |