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WMS
Tags
imageryBaseMapsEarthCover, United States, land surface, Maine
General mapping, planning, and other municipal uses.
This OGC-compliant web mapping service (WMS) provides 2008 aerial orthophotos at a resolution of 1 foot for Bar Harbor, Maine and some adjacent areas. The imagery were captured April 19, 2008 by Richard Crouse & Associates of Frederick MD, and further processed by KAPPA Mapping of Bangor ME to create orthophotos
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Extent
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| Maximum (zoomed in) | 1:5,000 |
| Minimum (zoomed out) | 1:150,000,000 |
ground condition
Users must assume responsibility to determine the usability of this data for their purposes.
Monday through Friday
This OGC-compliant web mapping service (WMS) provides 2008 aerial orthophotos at a resolution of 1 foot for Bar Harbor, Maine and some adjacent areas. The imagery were captured April 19, 2008 by Richard Crouse & Associates of Frederick MD, and further processed by KAPPA Mapping of Bangor ME to create orthophotos
General mapping, planning, and other municipal uses.
ground condition
None
None
Consistent with national standards for 1' ground sample distance (GSD).
Imagery for the Town of Bar Harbor was acquired on April 19, 2008 using a Z/I Digital Mapping Camera (DMC). This metric digital camera is capable of capturing true color, color infrared (CIR), and panchromatic (B&W) imagery at the same time. Positioning of the image centers were also captured using Airborne GPS (AGPS). Imagery was captured for an output suitable for a 1' ground sample distance (GSD). Richard Crouse & Associates of Frederick Maryland were selected to provide this service.
The coordinate system is Maine State Plane Coordinate System, East Zone, and the horizontal datum is NAD83. Units are in US Survey Feet. The vertical datum is NAVD 88.
Previous control points (from the 2004 aerial mapping project) were refreshed with new paint so that they would be visible for the 2008 imagery. The ground control was tied to the AGPS data. Pass, tie, and ground control points were measured using SoftPlotter 4.1. Albany software was used to aerotriangulate the data. Maximum residuals were less than 0.5 feet for X, Y, and Z.
Digital Terrain Models (DTM) are a necessary component to create ortho-rectified imagery. In this case, the existing 5' contour interval DTM was used, which was photogrammetrically captured from the 2004 imagery.
Digital orthophotographs (1.0' ground sample distance) were created from the aerial images, the camera calibration report, the aerotriangulation data, and the existing 2004 DTM. A cubic convolution algorithm was used to orthorectify each image (using SoftPlotter v4.1 software). Mosaicking was performed with INPHO OrthoVista 4.2 software. Mosaicking occurred along sharp linear features when possible and linear feathering was used to the blend the images.
Previous stereo-compiled planimetric features were compared to the same orthophoto features to ensure proper alignment. Image color was enhanced slightly with Adobe PhotoShop' s image adjustment tools. This step improves visual appeal without affecting po
Users must assume responsibility to determine the usability of this data for their purposes.
The Maine Office of GIS and the GeoLibrary Board provide web mapping services to distribute aerial photos and other digital data. A WMS is not a web application which you can see in a web browser; rather, it requires you to add the service to a GIS software application.
http://www.maine.gov/geolib/wms.htm