Laserfiche WebLink
<br />STANDARDS FOR DIGITAL LINE GRAPHS <br />FOR THE NATIONAL FLOOD INSURANGE PROGRAM <br />ATTRIBUTE GODING <br /> <br />FEKA HYDROGRAPHY <br /> <br />Node Attribute Codes <br /> <br />None <br /> <br />Area Attribute Codes <br /> <br />Major <br />Gode <br /> <br />000 <br /> <br />Minor <br />Code <br /> <br />0000 <br /> <br />Descrintor <br /> <br />Outside Area <br /> <br />430 <br /> <br />Line Attribute Godes <br /> <br />430 <br /> <br />430 <br /> <br />10/93 <br /> <br />0250 <br /> <br />0260 <br /> <br />0261 <br /> <br />Hydrography <br />Bisector <br /> <br />Cross Section <br />Shown On DFIRM <br /> <br />Computed Cross <br />Section Not <br />Shown On DFIRM <br /> <br />Comments <br /> <br />Each DLG provides a coherent description of <br />that portion of the earth's surface covered <br />by a 1:24,000-scale, 7.S-minute cell. To <br />maintain topological consistency and to <br />facilitate the combination (integration) of <br />multiple DLGs, the area ?utside the cell is <br />specifically identified for each DLG, This <br />area element, which must be the first area <br />present in each data category, is assigned a <br />single attribute code with major and minor <br />codes both equal to zero, <br /> <br />This code identifies the line bounding the <br />area covered by a USGS 7.S-minute quadrangle. <br />It is shown by FIS symbol L212. The area <br />inside the neatline must have at least one <br />centroid. <br /> <br />This code identifies a field-surveyed line <br />across a floodplain, as shown on the Flood <br />Insurance Rate Map or Flood Boundary Floodway <br />Map, at which computation of flood flow has <br />been made to establish a potential flood <br />elevation. This code is identified with a <br />parameter code (433 xxyy) that is usually <br />unique by stream. It is shown by FIS symbol <br />L20S. <br /> <br />This code identifies a field-surveyed line <br />across a floodplain. not shown on the DFIRM <br />but used for engineering analysis, at which <br />computation of flood flow has been made to <br />establish a potential flood elevation. This <br />code is identified with a parameter code (433 <br />xxyy) that is usually unique by stream. <br /> <br />31 <br />