[ Ø ] Harsh Prakash – GIS Blog

Quiet Musings On Applied Spatial (Health, Disaster, Technology, Planning et al.)

Archive for December, 2004

Digital conversion of Flood Insurance Rate Maps (DFIRMs): Summary

without comments

I have also added this post to this Wiki, in case you want to expound and guide those who follow – The post just helps me ensure the data doesn’t get spammed-out that easily:

My notes reflect procedural changes brought about by the integration of DFIRM Production Tools.

SCHEMA

  • Request jurisdiction(s) for existing geodata like new political boundaries and road names for use as base map. Base map geodata must NOT be older than 7 years.
  • Request GEOPOP from the MOD team and use it to create an empty DFIRM geodatabase. Use existing political boundaries for its geographic extent.
  • GEOPOP creates 3 table types- S (Spatial), L (Lookup) and D (Domain). Edit the main lookup tables:

L_COMM_INFO (community information)
L_SOURCE_CIT (source citation)
L_WTR_NM (hydrographic feature information- stream names etc)
L_STN_START (properties of starting points for stream distance measurements)

  • Create panel index and data catalogs
  • Georeference, scan and rectify geodata at its recommended scale to capture required floodplain features. Refer to FEMA MSC for full-sized PDFs of FIRM panels.

LINKS

Related:
* HEC-RAS Online Help
* WIKI: Edit Lock Schema

Written by Harsh

December 27th, 2004 at 8:12 pm