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Aerial imagery was acquired during spring leaf-off season for the 2024 Metro Area of Interest (AOI) encompassing approximately 940 square miles of contiguous, sectioned-centered tiles. A total of 3,687 4-band digital aerial images with a GSD less than 14cm were acquired in four lifts during March 14 - 17, 2024, using a Vexcel UltraCam large-format mapping camera (the Falcon Mark2) mounted in a fixed-wing aircraft. Imagery was acquired with 60% forward overlap between images in a flight line and 30% side-lap for photos in adjacent flight lines. Downtown Portland and bridges were flown with a forward image overlap of 80% and side-lap of 60% to reduce lean and distortion of tall structures. Resulting imagery was aerially triangulated to an existing ground control network and used to update an existing Digital Terrain Model to current conditions. Imagery was ortho-rectified to the updated terrain surface to eliminate ground displacement, and the most-nadir portion of each image was used in the final ortho-mosaic. |
| summary:
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Aerial imagery was acquired during spring leaf-off season for the 2024 Metro Area of Interest (AOI) encompassing approximately 940 square miles of contiguous, sectioned-centered tiles. A total of 3,687 4-band digital aerial images with a GSD less than 14cm were acquired in four lifts during March 14 - 17, 2024, using a Vexcel UltraCam large-format mapping camera (the Falcon Mark2) mounted in a fixed-wing aircraft. Imagery was acquired with 60% forward overlap between images in a flight line and 30% side-lap for photos in adjacent flight lines. Downtown Portland and bridges were flown with a forward image overlap of 80% and side-lap of 60% to reduce lean and distortion of tall structures. Resulting imagery was aerially triangulated to an existing ground control network and used to update an existing Digital Terrain Model to current conditions. Imagery was ortho-rectified to the updated terrain surface to eliminate ground displacement, and the most-nadir portion of each image was used in the final ortho-mosaic. |
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| thumbnail:
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| maxScale:
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4103.920089514234 |
| typeKeywords:
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["ArcGIS Server","Data","Image Service","Service"] |
| description:
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| licenseInfo:
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| catalogPath:
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| title:
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Aerial_2024_March |
| type:
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Image Service |
| url:
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https://gis.wilsonvillemaps.com/imageserver |
| tags:
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["Aerial Photo","Leaf-Off"] |
| culture:
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en-US |
| portalUrl:
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| name:
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Aerial_2024_March |
| guid:
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| minScale:
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65662.72143222774 |
| spatialReference:
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NAD_1983_HARN_StatePlane_Oregon_North_FIPS_3601_Feet_Intl |