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Indian River County Ortho hoto raphy Data Sets Month Year Color/B&W Resolution Formats Extent I Summer 2006 Color 1 ' / pixel GeoTIFF , MrSID Countywide May 2004 Color 1 ' / pixel '', TIFF , MrSID St . John ' s River Water Management District Select quarter sections slated for - February 2003 B &W 1 ' / pixel MrSID update inside the above boundary Recommendations County staff feel they would benefit from obtaining high resolution 1 " = 100 ' ( 1 /2 foot pixel resolution ) color aerial photography. GTG recommends Indian River County contract with a consultant to create new digital orthophotography and Lidar Mapping by 2008 . Given the DOR color aerial photography that will be available in summer of 2006, it would be cost-prohibitive and impractical for the County to acquire additional digital aerial photography in the short term . However, given the County ' s rapid development and urban/suburban growth , it is recommended that additional high resolution ( 1 /2 foot pixel ) digital color aerial photography be acquired for urban/suburban areas in 2008 . A .. comprehensive countywide acquisition is recommended for 2010 or 2011 . Although the data storage requirements are large for such data , it is recommended that the County determine whether it can allocate funding for the acquisition of selected orthophotography , such as areas with ongoing development , on a bi-annual ( or yearly) basis . By doing so, the County will ensure that its current inventory of digital orthophotography does not become outdated . It is recommended that the County utilize this type of photography to derive and generate new GIS data layers , including planimetric data layers . In addition , it is recommended that the County explore the possibility of performing change detection analysis using chronologically sequential digital orthophotography . It is recommended that Indian River County continue to utilize their existing digital orthophotography in a compressed format such as MrSID . Traditional digital orthophotography formats, such as TIFF , are inherently large and take up disk space . Compressed orthophotography aids the end user in the quick retrieval of information . In addition , the use of the digitally re-sampled orthophotography enables quicker printing and plotting . The display of compressed orthophotography can be configured to be scale- dependent . Using this configuration , end users view a map that displays the appropriate , higher-resolution imagery at a certain scale threshold . By maintaining orthophotography in a compressed format, the County will be able to distribute its digital orthophotography to remote sites more efficiently. 4-6 GIS Needs Assessment and Implementation Plan Chapter 4 - Base Map Creation and Consideration