City of Davis Orthophotos
In March, 2005, a series of aerial photographs were taken of Davis and the surrounding area. The photos, commissioned by the City of Davis, were digitized and orthorectified by the contractor to remove distortion introducted from varying camera angles, distances, and curvature of the camera lens. The contractor created a mosaic of the many overlapping aerial photographs to produce a series of digital orthorectified (i.e. aligned to the surface of the earth) photographs.
The resulting set of digital images, each covering approximately one-quarter square mile, have been made available by the City of Davis for public use. Each digital image file is in 24-bit color, approximately 5,624 x 5,782 pixels in size, and suitable for printing at map scales up to 1:1,200. The digital images can be downloaded from this web site as a Tagged Image File Format (TIFF) with a world header file for use in a geographic information system (GIS), or as a high-quality Joint Photographic Experts Group (JPEG) format. The image files in TIFF format are typically 100 megabytes in size and the image files in JPEG format are usually between 8 and 10 megabytes in size.
If a GIS or other mapping system is used to display the images, the TIFF world files can be used to place each TIFF image into the California State Plane coordinate system based on the North American Daturm of 1983/HPGN. Horizontal measurement units for the TIFF images are in U.S. Survey feet.
A comparable series of photos, taken March 4, 2003, is also available, as is a March 12, 2001 series.
The photos are available online as part of a joint project of the City and the Davis Community Network. The City furnished DCN with the TIF image set on a DVD-ROM. DCN furnished a web server, these selection pages, the Internet connection, and produced the preview and compressed JPG format files.
Davis Orthophoto Home Page
Davis Community Network
City of Davis Mapping & GIS
City of Davis