Map of land use in York Region in 1971. Created by the planning department of the Regional Municipality of York. Map uses aerial photography to measure distance, making it more accurate than previous maps.

Colour aerial photography at 1:10 000 scale of the Regional Municipality of York, Ontario taken in between April 14th and May 14th 2023, by First Base Solutions Inc. Colour digital orthophotography was developed from these images. Orthophotographs combine the image characteristics of the photograph with the geometric qualities of a map. Orthophotography was developed for the entire region. The 2023 digital orthophotographs have a 10cm ground pixel resolution. The 2023 digital orthophotos were subdivided into 1 kilometre by 1 kilometre tiles and were delivered in georeferenced Geotiff image files. The image tiles are horizontally referenced to 6 degree UTM projection and NAD -83 datum. Vertical control datum is referenced to mean sea level as Bench Marks established by the Geodetic Survey of Canada (CGVD28). The images were later combined by municipality and converted into nine MrSid format images covering the entire region.

Colour aerial photography at 1:10 000 scale of the Regional Municipality of York, Ontario taken in 2020 by First Base Solutions Inc. colour digital orthophotography was developed from these images. Orthophotographs combine the image characteristics of the photograph with the geometric qualities of a map. Orthophotography was developed for the entire region. The 2020 digital orthophotographs have a 10cm ground pixel resolution. The 2020 digital orthophotos were subdivided into 1 kilometre by 1 kilometre tiles and were delivered in georeferenced Geotiff image files. The image tiles are horizontally referenced to 6 degree UTM projection and NAD -83 datum. Vertical control datum is referenced to mean sea level as Bench Marks established by the Geodetic Survey of Canada (CGVD28). The images were later combined by municipality and converted into nine MrSid format images covering the entire region.

Tile Download Link Ortho Imagery - As the prime contractor, Bradstreet Consultants, Inc. used the aerial photography flown in one session on April 23-26, 2007, by The Sanborn Map Compay, Inc. of Charlotte, NC who acquired approximately 4,000 photos @ a resolution of 0.5' pixel (similar to 1"=600') with airborne GPS using a Z/I Digital Mapping Aerial Camera. Bradstreet Consultants, Inc. painted and repainted ground targets for photo survey control points (~400) to support full analytical aerotriangulation. The aerotriangulation solution was used to set up each stereopair of photos for orthorectification and DTM compilation. The ortho imagery was rectified from the natural color digial imagery employing a digital terrain model (DTM) collected from the 2007 imagery and supplemented from updating some town's original DTM and some town's from scratch using the imagery in softcopy (digital) stereoplotter in the Kork KDMS and DAT/EM AutoCAD DWG format.

2005 Digital Elevation Model of GTA & Hamilton derived from aerial photography acquired in the Spring of 2005. The basis of the DEM will be points and breaklines, density and accuracy to support 20cm orthoimagery.

Coverage Area includes all lands lying within the Regions of Durham, York, Peel and the City of Hamilton (Note: the Region of Halton and the City of Toronto are not included)

U.S. Geological Survey (USGS) and Virginia Institute of Marine Science (VIMS) scientists conducted field data collection efforts during June 11th - 16th, 2020, using a combination of remote sensing technologies to map riverbank and wetland topography and vegetation at five sites in the Chesapeake Bay Region of Virginia. The five sites are located along the James, Severn, and York Rivers. The work was initiated to evaluate the utility of different remote sensing technologies in mapping river bluff and wetland topography and vegetation for change detection and sediment transport modeling. The USGS team collected Global Navigation Satellite System (GNSS), total station, and ground based lidar (GBL) data while the VIMS team collected aerial imagery using an Unmanned Aerial System (UAS). This data release contains shapefiles of the processed GNSS and total station data, point clouds in the form of lidar data exchange (las) files from the ground lidar data and aerial imagery produced via Structure from Motion (SfM).

This dataset consists of true color aerial imagery of the Pisctaqua coastal region between York, ME and Cape Elizabeth, ME and was captured at 14.5-cm GSD and used to produce high resolution 6” orthorectified imagery with a one-foot accuracy. Imagery was collected on June 28th and 29th, 2021, during low tide conditions and within two hours of spring tides. Additional atmospheric considerations that were considered before each lift included flying in a sun angle between 25 degrees and 50 degrees, no more than 10% cloud cover, and less than 10 knots of a maximum predicted wind velocity. Additionally, flights were only be dispatched after a precipitation-free period of at least 48 hours. The project area consisted of approximately 400 images on approximately 7 flight lines with 60% forelap and 30% sidelap. Airborne GPS and IMU were be utilized during the acquisition to improve the aerotriangulation solution. Raw imagery was acquired using the Vexcel Eagle 80-mm Mark 3 mounted on a fixed wing aircraft and flown at an elevation of approximately 9,500 feet. Digital ortho-rectified imagery was created using the raw digital aerial imagery, ground control, aerotriangulation, and a digital elevation model. Existing State of Maine ground control was utilized in the aerotriangulation solution for this project. These aerial survey products were under contract for the State of Maine Department of Environmental Protection. Bluesky Geospatial captured the raw aerial imagery and James W. Sewall processed the raw imagery to develop the aerotriangulation solution and to create digital orthophotos and related products. Normandeau Associates served as Aerial Survey Coordinator to verify that project specifications were met.

Maine's eelgrass (SAV) meadows form an important aquatic habitat for the state. These meadows provide shelter for juvenile fish, and invertebrates. In certain locations they also help stabilize unconsolidated sediments and shorelines. Maine's Department of Marine Resources has mapped the SAV habitat for the entire coast using the Coastal Change Analysis Protocol. This mapping was accomplished from aerial photography acquired between 1993 and 1997. The unified coastal SAV data set is a composite of these multiple year data.

These data are in GIS shapefile format (.shp, .dbf, .shx, and .prj files) with associated metadata. And additional subdirectory contains data collected from the Wells, Maine region (York and Webhannet rivers in southern Maine) in 2001 and includes benthic data, sediment grab data, and sediment profile image data. Sample browse graphics of select attributes were generated at the NODC and included in this accession.

The benthic data is classified according to the System for Classification of Habitats in Estuarine and Marine Environments (SCHEME). This system is fully described in Development of a System for Classification of Habitats in Estuarine and Marine Environments (SCHEME) for Florida, Report to U.S. EPA - Gulf of Mexico Program, Florida Fish and Wildlife Conservation Commission, Florida Marine Research Institute. Review Draft 12/04/02.