north carolina cts committee meeting #9 june 19, 2001
TRANSCRIPT
North Carolina CTS North Carolina CTS Committee Meeting #9Committee Meeting #9
June 19, 2001
Introduction and Welcome Introduction and Welcome
Scoping/Basin Plans
Status Updates:Status Updates:
Phase I Scoping Phase I Scoping ScheduleSchedule
Proposed Phase II Proposed Phase II Scoping PlanScoping Plan
Scoping in 5 central river basins planned to start October 1, 2001: First emphasis on Chowan, Roanoke,
and Yadkin River Basins 36 counties 3 scoping teams
Catawba and New River Basins to follow 15 counties scoping teams tbd
Flood Data andMapping Development
Status Updates:Status Updates:
G&O StatusG&O Status
Watershed Concepts Watershed Concepts StatusStatus
White Oak Basin Tar Pamlico Basin
White Oak River White Oak River BasinBasin
Terrain: 100% Complete Survey: 100% Complete Hydrology: 50% Complete Hydraulics: 33% Complete Floodplain Mapping: 25% Complete Sample DFIRMs presented at ASFPM
White Oak River BasinWhite Oak River Basin
Onslow County – Preliminary Onslow County – Preliminary DFIRMsDFIRMs
Tar-Pamlico River Tar-Pamlico River BasinBasin
Field Survey: Structure Surveys: 100% Complete Cross Section Surveys: 50%
Complete High Water Mark Surveys: 15%
Complete H&H:
Hydrology: 10% Complete
Revised ScheduleRevised Schedule
White Oak River Basin DFIRM: August 30, 2001
LIDAR Surveys andDEM Development
Status Updates:Status Updates:
Watershed Concepts — LIDARWatershed Concepts — LIDARPre-Processing Status 6/08/01Pre-Processing Status 6/08/01
Watershed Concepts — Watershed Concepts — Vegetation Removal Status Vegetation Removal Status
6/08/016/08/01
G&O — Automated LIDAR G&O — Automated LIDAR Processing Status 6/08/01Processing Status 6/08/01
G&O — Bare Earth DEM G&O — Bare Earth DEM Generation Status 6/08/01Generation Status 6/08/01
G&O — TIN GenerationG&O — TIN GenerationStatus 6/08/01Status 6/08/01
LIDAR Quality Control Surveys
Status Updates:Status Updates:
Quality Control Quality Control SurveysSurveys
DFIRM Specifications
Status Updates:Status Updates:
DFIRM Graphic DFIRM Graphic SpecificationsSpecifications
State has received FEMA’s comments on latest prototype
New prototype that incorporates final comments will be generated for inclusion in DFIRM Delivery Order
DFIRM Database DFIRM Database SpecificationsSpecifications
Draft DFIRM database tables conceptualized for inventory, base mapping, and DFIRM mapping
Engineering judgement tables under discussion
Additional table definitions and documentation needed
Program Funding/Partnering
Status Updates:Status Updates:
Information Technology Information Technology Requirements Analysis, Requirements Analysis,
Preliminary System Design, Preliminary System Design, Work Plan, and Delivery Work Plan, and Delivery
OrderOrder
Higher Standards Draft Higher Standards Draft DocumentDocument
Policy & Procedures Policy & Procedures ManualManual
Purpose of the Purpose of the ManualManual
Consolidate information about the NC Flood Mapping Program in one location
Inform new staff about the program
Serve as a resource for future CTS projects
Contents of the Contents of the ManualManual
Two major units Policies Procedures
Appendices to include Mapping Activity Statements, a template for the basin plans, and templates for the Delivery Orders
Policies UnitPolicies Unit
Explanation of the process for raising and resolving programmatic issues and for establishing new policies
Flowchart depiction of the process Policy establishment
Procedures for Mapping Procedures for Mapping UnitUnit
Overview of the flood mapping process for North Carolina
Sections to describe the mapping components: Scoping Leveraging Existing Geospatial Data
Resources Production
Topographic Data Development Flood Data Development DFIRM Production Quality Control Reviews
Procedures for Mapping Procedures for Mapping UnitUnit
(continued)(continued) Post-Preliminary Processing Data Dissemination and Archiving Map Maintenance Education/Outreach Contracting Approach Higher Standards Flood Warning System Post-Flood Verification Partnerships Funding
Procedures for Mapping Procedures for Mapping UnitUnit
(continued)(continued) Where applicable, each of the
sections will have two subsections for (1) Procedures and (2) Standards and Specifications
Partnering/MOAPartnering/MOA
Community Community PartneringPartnering
Cooperating Technical Partner MOA
GIS Data Sharing MOA
Issue Discussion:Issue Discussion:Surface Water Mapping for
DFIRMs
PurposePurpose
This issue paper is a discussion of the mapping and handling of surface water features and names as part of the DFIRM production for North Carolina.
BackgroundBackground
The mapping of surface waters is desired to be comprehensive, accurate, and complementary of the other data layers that are part of the FMP and the Corporate Geographic Database.
Existing Data Existing Data ResourcesResources
Statewide 24k by River Basin Statewide NHD24k by Cataloging Unit FMP Breaklines 12k Locally derived surface The US Geographic Names
Information System (GNIS) Existing FIRMs and FIS contain surface
water feature names
BreaklinesBreaklines
It contains single, double, and centerlines for units 1 square mile and larger.
It does NOT contain all of the same linework as USGS Topo.
It is more accurate (1:12,000 and 1:4,800). It is hydrologically corrected (dendritic
network, flowing downhill). It is topologically corrected (no dangles,
except at network inputs and outfalls).
Issue Discussion:Issue Discussion:
Panel Numbering
DFIRM Map Numbering DFIRM Map Numbering SystemSystem
SS = State FIPs code (37)
X
MM = EN 1,000,000-ft coordinates
LLLL = LRMP map numbers to include EN 100,000-ft coordinates and the EN 10,000-ft coordinates
PP = place holders for additional EN 1,000-ft coordinates (00 for panels printed at 1"=500')
X = panel suffix (“A” for initial edition)
SSMMLLLLPP
DFIRM Map Numbering DFIRM Map Numbering System (Continued)System (Continued)
New DFIRM panels in North Carolina could either be compiled at 1”=1,000’, covering an area of 20,000 ft x 20,000 ft (20” x 20” maps); or the DFIRM panels could be compiled at 1”=500’, covering an area of 10,000 ft x 10,000 ft (20” x 20” maps).
An additional 2-digits (both zeros) are held in reserve as a “place holder” in the event that future DFIRM panels may be printed at a larger scale, e.g., 1” = 250’, covering an area of 5,000 ft x 5,000 ft for which the 1,000 ft coordinates would either be 0” or 5."
Issue Discussion:Issue Discussion:
Potential Delegation of LOMCs
Potential Delegation of Potential Delegation of LOMCsLOMCs
On Friday June 15, 2001, the following individuals from NC visited D&D for a LOMC Introduction / Workshop Gary Thompson (NCGS) Kurt Sumner (Executive Director ACSM, National) Tom Morgan (NCSS Representative on CTS) Johnie Garrason (NCSS Member and Board
Examiner for NC Engineers and Surveyors)
Richard Bennett (NCSS President) Benji Brown (NCSS Member and City of
Wilmington Representative) Matt Miller (FEMA HQ) Teleconferenced in for a
portion of the afternoon discussion
Potential Delegation of Potential Delegation of LOMCsLOMCs
The following topics were covered during the LOMC Introduction/Workshop General LOMC Requirements New LOMR-F Rule Processing Cases with Special Considerations Call Center Support LOMA 2000 Processing Workshop Other Related Processing Issues Where do we go from here?
Action Items/Wrap UpAction Items/Wrap Up