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FLOOD09505
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Last modified
1/26/2010 10:09:27 AM
Creation date
10/5/2006 4:24:44 AM
Metadata
Fields
Template:
Floodplain Documents
County
Statewide
Basin
Statewide
Title
Standards for Digital Flood Insurance Rate Maps
Date
10/1/1993
Prepared By
FEMA
Floodplain - Doc Type
Historic FEMA Regulatory Floodplain Information
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<br />'Name of Carto"raDhic Unit: <br /> <br />Defines the name of the USGS map sheet, followed by the state two- character <br />designator. The name is a string of up to 40 alphanumeric characters. See <br />Appendix E for oversized map sheet naming convention. <br /> <br />Date of Ori"inal Source. Date of Revision: <br /> <br />Defines the year of the original digitization of the Flood InsuranCE Rate Map <br />followed by a conuna and the year of the latest revision date if applicable. The <br />date may be a string of up to 10 alphanumeric characters. <br /> <br />Revision Date Oualifier: <br /> <br />Qualifier to discriminate reViSion date if present. Code is: <br />R - Restudy, L ~ Limited Map Maintenance Program (LMMP) , V ~ Revision u',der parts <br />65, 67, 70. <br /> <br />Scale of Source Material: <br /> <br />Defines the map scale. Usually 24000. <br /> <br />UTM Coordinate Zone: <br /> <br />Defines the zone in the ground planimetric reference system. Appendix C lists <br />the UTM coordinate zone codes. <br /> <br />Resolution: <br /> <br />Defines the true ground distance corresponding to one unit (0,001 inch at map <br />scale) in the file .internal coordinate system used in data collect:ioll.. <br /> <br />.!lcale <br /> <br />Resolution <br /> <br />1:24,000 <br />1:25,000 <br />1:48,000 <br />1:62,500 <br /> <br />0.6lM <br />0.635M <br />L22M <br />L 587M <br /> <br />MaD Pro;ection Parameters: <br /> <br />The optional DLG distribution format includes 15 fields reserved for map <br />proj ection parameters. These parameters are typically used as input for a <br />coordinate transformation package. <br /> <br />When the ground coordinate system of a DLC is the Universal Transverse Mercator <br />system, as in the case for all DLGs digitized from 1:24,000-soale maps, only the <br />first two of the 15 parameter fields are used: <br /> <br />L <br />2. <br />3-15. <br /> <br />Longitude of any point in UTM zone, <br />Latitude of any point in UTM zone, <br />Not used (-0). <br /> <br />Normally placed at t',e <br />center of the DLG cell. <br /> <br />10/93 <br /> <br />8 <br />
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