The State of Maryland generally obtains two imagery products:
High Resolution 6 Inch ImageryThe Maryland Department of Information Technology (DoIT) has executed a Digital High-Resolution Aerial Photography Contract through the CATS+ contracting vehicle.
State of Maryland imagery collection cycle is as follows:
6 Inch High Resolution ImageryImagery is obtained in three year cycles.
Yes, local jurisdictions can use this contract to obtain aerial photography or other buy-ups. The buy-ups include:
The high-resolution imagery is always obtained during leaf-off periods. The collection is done during this time because the imagery program is primarily funded by the Maryland Emergency Numbers System Board and therefore supports emergency response efforts. Leaf-off imagery allows for more effective coordination and response efforts when used by the local jurisdiction public safety answering points. There is also an extensive review process done by the local jurisdictions to ensure quality control of the products.
MD iMAP offers the imagery as a variety of services and raw data downloads. We offer both Map and Image services of the latest imagery. Historic imagery services are also available. Please visit our Imagery Downloads page to explore the different ways you can obtain the raw imagery.
An image service allows the user to access any attributes associated with the imagery, you can query and identify. You can also use the image service to manipulate the color bands to switch to products such as Color Infrared.
Yes, the imagery has the web map service (WMS) capability enabled. A WMS service makes the imagery available across different platforms and clients. Any client built to support WMS can view and work with the service.
High-Resolution ImageryAerial imagery is currently required to meet American Society for Photogrammetry and Remote Sensing (ASPRS) Class I Accuracy Standards for 1" =200' maps. The base product is collected at a 6 inch ground pixel resolution with a horizontal accuracy of 4.895 feet. The current specifications also require the imagery shall be 4-band (Red, Green, Blue, and Near-Infrared) and leaf-off.
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