EmergencyFlood_FEMAFLCC

Metadata also available as

Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Jay Appleton, Data Center Manager
Publication_Date: 19940713
Publication_Time: unknown
Title: EmergencyFlood_FEMAFLCC
Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: 100-Year And 500-Year Incidence Flood Plains
Issue_Identification:
Publication_Information:
Publication_Place: South Burlington, VT 05403
Publisher: Chittenden County Regional Planning Commission
Other_Citation_Details: Tile Structure - County
Online_Linkage:
<http://www.vcgi.org/dataware/default.cfm?layer=EmergencyFlood_FEMAFLCC>
Online_Linkage:
<http://www.vcgi.org/dataware/default.cfm?layer=EmergencyFlood_FEMAFLCC&mapit=yes>
Online_Linkage:
<http://maps.vcgi.org:8080/wmsconnector/com.esri.wms.Esrimap?servicename=DATAWARE_VCGI&VERSION=1.1.1&request=getmap&BBOX=-73.45416,42.72279,-71.46528,45.018356&SRS=EPSG:4326&LAYERS=EMERGENCY_FEMAFLCC_POLY&WIDTH=300&HEIGHT=400&FORMAT=image/gif>
Online_Linkage:
<http://maps.vcgi.org:8080/wmsconnector/com.esri.wms.Esrimap?servicename=DATAWARE_VCGI&VERSION=1.1.1&request=getmap&BBOX=-73.45416,42.72279,-71.46528,45.018356&SRS=EPSG:4326&LAYERS=EMERGENCY_FEMAFLCC_LINE&WIDTH=300&HEIGHT=400&FORMAT=image/gif>
Description:
Abstract:
These data contain floodplains identified on US Federal Emergency Management Agency (FEMA) FIRM's. The FIRM's are not georeferenced, nor do they appear to use a known projection such as UTM. Georeferencing for automation in a GIS was accomplished through manual overlay of reference features in GIS format such as roads, polygonal water shorelines, and stream centerlines. Floodplains are identified along rivers, streams, lakes, ponds, and wetlands. These data identify possible flood-prone areas, but they do not constitute a delineation of floodplain boundaries. These data represent a starting-point for floodplain mapping in the GIS environment. They are however, an identification of floodplains and not a delineation of floodplain boundaries for 100- and 500-year events. These data require refinement and correction, or complete regeneration in a georeferenced format. The data indicate in what general areas lands likely to be flooded lie, but they do not constitute a floodplain boundary delineation. They should be used with caution, bearing in mind they could be highly inaccurate in some locations. Finally, only the FEMA FIRM's are the official floodplain maps; not these data. Therefore site-specific determinations using these data is inappropriate; site-specific determinations should be done using the source FIRM(s), site inspections, interviews of people who witnessed historic floods, and if needed, hydrologic engineering studies.
Purpose: 100-Year And 500-Year Incidence Flood Plains
Supplemental_Information: Geographic extent - Chittenden County, Vermont
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1980'S
Time_of_Day: unknown
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: unknown
Time_of_Day: unknown
Range_of_Dates/Times:
Beginning_Date: 1980'S
Beginning_Time: unknown
Ending_Date: unknown
Ending_Time: unknown
Currentness_Reference: Ground Condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: To Be Determined
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -73.362100
East_Bounding_Coordinate: -72.803600
North_Bounding_Coordinate: 44.722800
South_Bounding_Coordinate: 44.161400
Keywords:
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: emergency
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: 100-Year And 500-Year Incidence Flood Plains
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Chittenden County, Vermont
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: 1980'S
Access_Constraints: None
Use_Constraints:
These data do not comprise the official FEMA floodplain maps, and hence these data are not suitable for determining flood insurance policies or premiums, or for financial institution lending policies or practices. These data should not be used without also consulting the source FEMA Flood Insurance Rate map(s). These data represent an identification of possible flood-risk areas, but do not constitute a delineation of flood-risk area boundaries. FEMA Flood Insurance Rate Maps are not georeferenced in a coordinate system. While every effort was made to precisely transfer the linework into a coordinate system for automation, inaccuracies exist in these data. Hence these data should not be considered derived from engineering studies or surveys. There is no warranty implied as to accuracy or precision of these data, or for a a particular use. The Chittenden County Regional Planning Commission is not responsible for subsequent use of these data, or for products derived from these data.
Point_of_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Jay Appleton, Data Center Manager
Contact_Organization: Chittenden County Regional Planning Commission
Contact_Position: GIS Database Manager
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 30 Kimball Avenue, Suite 206
City: South Burlington
State_or_Province: VT
Postal_Code: 05403
Country: USA
Contact_Voice_Telephone: 802-846-4490
Contact_TDD/TTY_Telephone: None
Contact_Facsimile_Telephone: 802-846-4494
Contact_Electronic_Mail_Address: ccrpc@ccrpcvt.org
Hours_of_Service: 9 AM - 5 PM EST
Data_Set_Credit: Chittenden County Regional Planning Commission
Security_Information:
Security_Classification_System: No security considerations
Security_Classification: Unclassified
Security_Handling_Description: Not applicable
Native_Data_Set_Environment: ARC/INFO
Cross_Reference:
Citation_Information:
Originator: Jay Appleton, CCRPC Data Center Manager
Publication_Date: 19940713
Publication_Time: unknown
Title: 100-Year And 500-Year Incidence Flood Plains
Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: EmergencyFlood_FEMAFLCC
Issue_Identification:
Publication_Information:
Publication_Place: South Burlington, VT 05403
Publisher: Chittenden County Regional Planning Commission
Other_Citation_Details: Tile Structure - County
Online_Linkage: <http://www.vcgi.org>
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
FIRM's identify areas subject to flooding based upon hydrologic and hydraulic analyses. Floodplain designation is given in terms of the likelihood or risk that an area will be inundated. This is because FEMA developed FIRM's to assist insurance underwriters in writing policies for property owners in flood-prone areas. In terms of land use regulation by municipalities, the studies which accompany FIRM development state that FIRM's are "designed to assist communities in developing sound flood plain management measures." No other detail or caveats are given beyond this statement.
Hydrologic analyses used historic flood information to establish peak discharge-frequency and elevation-frequency relationships at selected recurrence intervals for flood sources in the study community. Hydraulic analyses measured and modelled the characteristics of flood sources to provide estimates of the elevations of floods at at selected recurrence intervals.
For inland areas such as Vermont, three types of flood plains, or Flood Insurance Zones are identified. Zone A is areas flooded by an 100-year event (a 100-year recurrence interval). Zone B is the additional area outside of Zone A that is flooded by a 500-year event. Zone C are areas of minimal flooding. In any given year there is a 1% (1 in 100) chance that an area in Zone A will be flooded; this risk rises to 40% for a 50-year period, and to 60% for a 90-year period. In any given year there is a 0.2% chance that an area in Zone B will be flooded.
Areas in Zone A are commonly referred to as 100-year flood- plains, and those in Zone B are called 500-year flood- plains. Note that Zone B is the additional area above Zone A in elevation that would be flooded by a 500-year event; in actuality a 500-year floodplain includes all of the 100-year floodplain, as Zone A is flooded with five-times greater frequency than Zone B. The zone designations are contained in the ZONE item in the PAT.
There is also an occasional Zone D, areas where the flood risk was not determined. These area areas not studied, and hence can be considered missing data - unknown flood risk. In Chittenden County the single Zone D are is the UVM Research Forest in Jericho.
For insurance applications, flood zones are further differentiated with ratings which correspond to Flood Hazard Factors (FHF's) used by insurance underwriters in insurance rate tables. Shown as numbers appended onto the ZONE on FIRM's, this rating (HAZARD in the .PAT) is a relative measure of the variablity flood water level between a 10- and 100-year event. (If HAZARD is blank (missing) on the FIRM's, it indicates that this rating was not determined. Letter HAZARD codes indicate variations on not determining the rating.) The higher the HAZARD number, greater the flood elevation difference between the 10 and 100-year flood events. A low HAZARD number means that the water level of a 100-year flood is not that much greater than that reached in a 10-year flood. Since flood water level elevation is determined by stream channel shape, watershed and floodway topography, the HAZARD rating will vary with location along river or stream.
An insurance underwriter will use the HAZARD number and ZONE to derive a FHF (Flood Hazard Factor). The FHF is used in insurance rate tables to derive policy premiums. FHF's increment up by 5 starting with A1 (i.e. ZONE = A and HAZARD = 1), as shown below.
ZONE/HAZARD FHF A1 005 A2 010 A3 015 . . A10 050 etc. etc.
Since FIRM's identify 100-year floodplains, HAZARD or FHF provide a measure of the likelihood of flooding in 10-year events, which have a 10% chance of occurring in a given year. A lower FHF rating indicates that a larger portion of the 100-year floodplain area will be inundated by a 10-year event. For insurance underwriters, a lower FHF equates to a greater chance of having to pay a policy holder for flood damages, as 10-year flood events occur with ten times greater frequency than 100-year events. FHF designations can be found in the HAZARD item in the PAT.
The numerical flood elevation difference relate to FHF as follows. If the flood elevation difference between the 10- and 100-year events is 0.7 foot, the FHF is 005 (HAZARD = 1). When the difference is 1.4 feet, the FHF is 015 (HAZARD = 3), and for an elevation difference of 5.0 feet, the FHF rises to 050 (HAZARD = 10).
Quantitative_Attribute_Accuracy_Assessment:
Attribute_Accuracy_Value: Unknown
Attribute_Accuracy_Explanation: Unknown
Logical_Consistency_Report:
Illogical code combinations were identified with ARC FREQUENCY and corrected.
Completeness_Report:
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
FIRM's must be georeferenced prior to automation in a GIS, that is the maps must be put into a coordinate system. The methodology employed takes great liberty in this step. It was hoped that since USGS topographic quadrangles are in the Universal Transverse Mercator (UTM) projection, the FIRM's would use the same. This was found to not be the case. The FIRM's appear to be projection-less, or arbitrary.
The methodology is as follows. Mylar overlay plots of Vermont State Plane (NAD27) GIS data were produced at the FIRM map scale. Roads, rail, political boundaries, and surface waters were plotted, and were used to orient the overlay to the same features shown on FIRM's. The floodplain boundaries could then be traced onto the mylars. Since the overlay plots also included a 500-meter Vermont State Plane grid, the overlays could then be registered, and the FIRM linework digitized directly into State Plane meters.
Road and rail lines came from 1:5000 orthophotos. Political boundaries came from a variety of sources. Surface water data were a problem because Chittenden County lacks reliable data. Existing stream centerline data are of questionable accuracy and precision and could not be used for this project. Therefore stream centerlines appearing on a FIRM were digitized from 1:24000 USGS topographic quadrangles for use on the mylar overlays. For polygonal water, either 1:20000 orthophoto or 1:5000 orthophoto water was used. The FIRM's themselves were at a variety of scales, ranging from 1:4800 to 1:12000 (see FLP.MAPS).
The State Plane data does not overlay FIRM features with any degree of precision. Overlay and floodplain boundary transferral was done section-by-section, with reorient- ation, backing-up or advancing forward along a river occurring every 8-12 inches at plot scale. Hence flood zones were stretched, shrunk, or pulled relative to the source FIRM. Care was taken to minimize this by giving the most reliable reference features the most weight. More reliable reference points on the FIRM's are points where hydrogists/engineers studied or tied into to calculate flow rating coefficients and to estimate flood elevations. These are typically features near the flood-source water body such as roads, and also include elevation reference marks (RM's), bridges and culverts. Features far from the floodplain and political boundaries were given little weight.
Mapping of floodplains by FEMA was done on a town-by-town basis, which resulted in two shortcomings with the FIRM maps. First, Towns were asked to participate in the mapping process. By this it is presumed that Towns were asked to contribute money to the project, and all but 3 Chittenden County towns participated. For the non- participating Towns of Hinesburg, St. George, and Westford, the mapping quality is not as detailed and tends to be done at smaller scales. Specifically, the maps for these three Towns are rough and floodplains are very approximate. Mapping quality and source scales are documented in FLP.MAPS for each set of Town maps. (Also note that while Buels Gore is not mapped, supporting documentation was found stating that no flood-prone areas were identified in Buels Gore.) The second problem is that Town FIRM maps were not edgematched one to another. Therefore floodplains begin or end on Town boundaries in these data.
Other problems arose in transferal of FIRM linework to Vermont State Plane coordinates. There were instances where the State Plane reference surface water data did not fall within the corresponding FIRM floodplain at all. Overlay orientation would have been so excessive that the resulting linework would be arbitrary. Except for major water features, the FIRM floodplain was drafted as shown, resulting the the corresponding USGS stream going outside the floodplain. For major water features, such Lake Iroquois in Williston, the floodplain was drafted by eye to match that on the FIRM relative to the water feature using the orthophoto or USGS water feature. As noted above, occasionally a floodplain identified on one town FIRM stops at the town boundary and is not continued on the abutting town's FIRM. For these, dummy arcs were added to close polygons. If the dummy arc was a political boundary, it received a SOURCE code of TB or COUNTY. Notes were entered into FLP.NOTES describing all such problem areas.
Finally, the arc SOURCE code uses a DUMMY value. This was used to divide two HAZARD areas within a given ZONE, such as dividing zone A4 from zone A8. Arcs dividing two different ZONEs, such as A from B, are coded SOURCE = FIRM. Any exceptions are described in FLP.NOTES.
Quantitative_Horizontal_Positional_Accuracy_Assessment:
Horizontal_Positional_Accuracy_Value: UNKNOWN
Horizontal_Positional_Accuracy_Explanation:
Source accuracy and automation methodology assessment - UNKNOWN
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: Chittenden County Regional Planning Commission
Publication_Date: 19940713
Publication_Time: unknown
Title: EmergencyFlood_FEMAFLCC
Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: EmergencyFlood_FEMAFLCC
Issue_Identification:
Publication_Information:
Publication_Place: South Burlington, VT 05403
Publisher: Chittenden County Regional Planning Commission
Other_Citation_Details: Tile Structure - COUNTY
Online_Linkage: <http://www.vcgi.org>
Source_Scale_Denominator: 1:4800 - 1:24000
Type_of_Source_Media: Folded Paper
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1980'S
Time_of_Day: Unknown
Multiple_Dates/Times:
Single_Date/Time:
Calendar_Date: 1980'S
Time_of_Day: Unknown
Range_of_Dates/Times:
Beginning_Date: 1980'S
Beginning_Time:
Ending_Date:
Ending_Time:
Source_Currentness_Reference: Ground Condition
Source_Citation_Abbreviation: EmergencyFlood_FEMAFLCC
Source_Contribution:
Fema Flood Insurance Rate Maps Chittenden County Regional Planning Commission
Process_Step:
Process_Description:
Bolton FIRM's automated Jay Appleton, CCRPC
Source_Used_Citation_Abbreviation: FIRM's 500308-nnn
Process_Date: 19930113
Process_Time: Unknown
Process_Step:
Process_Description:
South Burlington FIRM's automated Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: FIRM's 500195-nnn
Process_Date: 19930611
Process_Time: Unknown
Process_Step:
Process_Description:
Essex FIRM's automated Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: FIRM's 500034-nnn
Process_Date: 19930711
Process_Time: Unknown
Process_Step:
Process_Description:
Essex Junction FIRM's automated Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: FIRM's 500035-nnn
Process_Date: 19930711
Process_Time: Unknown
Process_Step:
Process_Description:
Winooski FIRM's automated Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: FIRM's 500044-nnn
Process_Date: 19930726
Process_Time: Unknown
Process_Step:
Process_Description:
Burlington FIRM's automated Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: FIRM's 500032-nnn
Process_Date: 19930728
Process_Time: Unknown
Process_Step:
Process_Description:
Colchester FIRM's automated Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: FIRM's 500033-nnn
Process_Date: 19930923
Process_Time: Unknown
Process_Step:
Process_Description:
Williston FIRM's automated Charles Ferree, CCRPC
Source_Used_Citation_Abbreviation: FIRM's 500043-nnn
Process_Date: 19940117
Process_Time: Unknown
Process_Step:
Process_Description:
Richmond Village FIRM automated Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: FIRM 500041-001
Process_Date: 19940124
Process_Time: Unknown
Process_Step:
Process_Description:
Richmond Town FIRM's automated Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: FIRM's 500040-nnn
Process_Date: 19940124
Process_Time: Unknown
Process_Step:
Process_Description:
Jericho FIRM's automated Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: FIRM's 500037-nnn
Process_Date: 19940310
Process_Time: Unknown
Process_Step:
Process_Description:
Shelburne FIRM's automated Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: FIRM's 500193-nnn
Process_Date: 19940314
Process_Time: Unknown
Process_Step:
Process_Description:
Milton FIRM's automated Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: FIRM's 500038-nnn
Process_Date: 19940321
Process_Time: Unknown
Process_Step:
Process_Description:
St. George FIRM automated Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: FIRM's 500320-001
Process_Date: 19940321
Process_Time: Unknown
Process_Step:
Process_Description:
Charlotte FIRM's automated Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: FIRM's 500309-nnn
Process_Date: 19940323
Process_Time: Unknown
Process_Step:
Process_Description:
Hinesburg FIRM's automated Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: FIRM's 500322-nnn
Process_Date: 19940324
Process_Time: Unknown
Process_Step:
Process_Description:
Westford FIRM's automated Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: FIRM'S 500203-nnn
Process_Date: 19940325
Process_Time: Unknown
Process_Step:
Process_Description:
Huntington FIRM's automated Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: FIRM's 500036-nnn
Process_Date: 19940325
Process_Time: Unknown
Process_Step:
Process_Description:
Underhill FIRM's automated Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: FIRM's 500042-nnn
Process_Date: 19940328
Process_Time: Unknown
Process_Step:
Process_Description:
County-wide coverage complete and tuned Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: not applicable
Process_Date: 19940330
Process_Time: Unknown
Process_Step:
Process_Description:
Arc and polygon codes checked and corrected with proof plots Mike Shellito, CCRPC
Source_Used_Citation_Abbreviation: Various FEMA FIRM maps
Process_Date: 19940621
Process_Time: Unknown
Process_Step:
Process_Description:
Final code check and corrections; global UNSPLIT, and tuning Jay Appleton, CCRPC
Source_Used_Citation_Abbreviation: not applicable
Process_Date: 19940713
Process_Time: Unknown
Process_Step:
Process_Description:
Data loaded into VGIS data warehouse. Metadata updated to reflect changes. Tom Williams, VCGI
Source_Used_Citation_Abbreviation: not applicable
Process_Date: 20041026
Process_Time: Unknown
Spatial_Data_Organization_Information:
Indirect_Spatial_Reference: NETWORK
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: G-polygon
Point_and_Vector_Object_Count: 1871
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Grid_Coordinate_System:
Grid_Coordinate_System_Name: State Plane Coordinate System
State_Plane_Coordinate_System:
SPCS_Zone_Identifier: 4400
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.999964
Longitude_of_Central_Meridian: -72.500000
False_Easting: 500000.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 0.001
Ordinate_Resolution: 0.001
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 1 / 298.25722210
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Point or Polygon
Entity_Type_Definition: 2-D representation
Entity_Type_Definition_Source: VCGI/RPC
Attribute:
Attribute_Label: HAZARD
Attribute_Definition: Rating which corresponds to Flood Hazard Factor (FHF)
Attribute_Definition_Source: FEMA Flood Insurance Rate Maps
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 99
Enumerated_Domain_Value_Definition: Flood protection system under construction will protect area
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: E
Enumerated_Domain_Value_Definition: Base flood elevations determined
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: H
Enumerated_Domain_Value_Definition: Area of shallow flooding (1-3 ft depth); FHF not determined
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: O (letter)
Enumerated_Domain_Value_Definition: Area of shallow flooding (1-3 ft depth); FHF not determined
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: blank
Enumerated_Domain_Value_Definition: Base flood elevations and FHF not determined
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: number
Enumerated_Domain_Value_Definition: Rating which corresponds to a Flood Hazard Factor (FHF)
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Range_Domain:
Attribute_Units_of_Measure: Character String
Attribute_Measurement_Frequency: As needed
Attribute:
Attribute_Label: ZONE
Attribute_Definition: Chance or risk of flooding
Attribute_Definition_Source: FEMA Flood Insurance Rate Maps
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: A
Enumerated_Domain_Value_Definition: Area of 100-year flood - 1% chance of flooding in a year
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: B
Enumerated_Domain_Value_Definition: Area between 100- and 500-year flood - 0.2% chance in a year
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: C
Enumerated_Domain_Value_Definition: Area of minimal flooding
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: D
Enumerated_Domain_Value_Definition: Area of undetermined, but possible, flood hazard
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: L
Enumerated_Domain_Value_Definition: Lake Champlain lakebed
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: V
Enumerated_Domain_Value_Definition: Area of 100-year coastal flood velocity (wave action)
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: X
Enumerated_Domain_Value_Definition:
ZONE A which is clearly out in the Lake - See EmergencyFlood_FEMAFLCC.NOTES
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Range_Domain:
Attribute_Units_of_Measure: Character String
Attribute_Measurement_Frequency: As needed
Detailed_Description:
Entity_Type:
Entity_Type_Label: Arc attributes
Entity_Type_Definition: 2-D representation
Entity_Type_Definition_Source: VCGI/RPC
Attribute:
Attribute_Label: SOURCE
Attribute_Definition: Source of arc
Attribute_Definition_Source: CCRPC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: CCRPC
Enumerated_Domain_Value_Definition: Floodplain boundary arc made by CCRPC - NOT from FIRM
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: COUNTY
Enumerated_Domain_Value_Definition: County boundary used to enlose coverage from universe
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: DUMMY
Enumerated_Domain_Value_Definition: Arc dividing one HAZARD from another within a ZONE
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: FIRM
Enumerated_Domain_Value_Definition: Arc transferred from Federal Flood Insurance Rate Map (FIRM)
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: LAKE
Enumerated_Domain_Value_Definition: Lake Champlain shoreline from 1:5000 orthophotos
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: OLD_FIRM
Enumerated_Domain_Value_Definition: Old 1975 FIRM linework used for some arcs in Underhill
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: SW
Enumerated_Domain_Value_Definition: Polygonal river shoreline from 1:20000 or 1:5000 orthophotos
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: TB
Enumerated_Domain_Value_Definition: Town boundary from parcel map used to close polygon
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Range_Domain:
Attribute_Units_of_Measure: Character String
Attribute_Measurement_Frequency: As needed
Attribute:
Attribute_Label: TYPE
Attribute_Definition: Type of arc
Attribute_Definition_Source: CCRPC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: COUNTY_BND
Enumerated_Domain_Value_Definition: County boundary
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: EmergencyFlood_FEMAFLCC_BND
Enumerated_Domain_Value_Definition: Floodplain boundary
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: HAZ_BND
Enumerated_Domain_Value_Definition: Hazard factor boundary within a ZONE, e.g. divides A from A8
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: LAKE_BND
Enumerated_Domain_Value_Definition: Lake Champlain shoreline
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: RIVER_BND
Enumerated_Domain_Value_Definition: River shoreline - not a floodplain boundary
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: ZN_D_BND
Enumerated_Domain_Value_Definition: Zone D boundary (zone D is area not in FEMA study)
Enumerated_Domain_Value_Definition_Source: VCGI/RPC - EmergencyFlood_FEMAFLCC
Attribute_Domain_Values:
Range_Domain:
Attribute_Units_of_Measure: Character String
Attribute_Measurement_Frequency: As needed
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: VT Center for Geographic Information
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 58 South Main Street, Suite 2
City: Waterbury
State_or_Province: VT
Postal_Code: 05676
Country: USA
Contact_Voice_Telephone: 802/882-3000
Contact_TDD/TTY_Telephone: None
Contact_Facsimile_Telephone: 802/882-3001
Contact_Electronic_Mail_Address: info@vcgi.org
Hours_of_Service: 9am - 5pm, M-F
Resource_Description: EmergencyFlood_FEMAFLCC
Distribution_Liability:
VCGI and the State of Vermont make no representations of any kind, including but not limited to the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the data.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: SHP
Format_Specification: ESRI Shapefile format (compressed to ZIP format)
Format_Information_Content: geospatial data
File_Decompression_Technique: ZIP decompression software
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name:
<http://www.vcgi.org/dataware/default.cfm?layer=EmergencyFlood_FEMAFLCC>
Access_Instructions: Download from web site.
Offline_Option:
Offline_Media: CD-ROM
Offline_Option:
Offline_Media: 3-1/2 inch floppy disk
Offline_Option:
Offline_Media: 4 mm cartridge tape
Fees:
No charge when downloading from the internet, and when no custom processing is required.
Ordering_Instructions:
Download from web site or mail-fax a copy of the VCGI 'Data Request Form' which is available from the VGIS web site <http://www.vcgi.org/dataware/order_forms>
Turnaround: About 5 days.
Custom_Order_Process:
Mail or Fax a copy of the VCGI 'Data Request Form' which is available from <http://www.vcgi.org/dataware/order_forms>
Technical_Prerequisites: ESRI Arc/Info, ArcView, or ArcExplorer software.
Available_Time_Period:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20041026
Time_of_Day: Unknown
Metadata_Reference_Information:
Metadata_Date: 20041026
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: VT Center for Geographic Information
Contact_Person: GIS Database Administrator
Contact_Address:
Address_Type: Mailing and Physical Address
Address: 58 South Main Street, Suite 2
City: Waterbury
State_or_Province: VT
Postal_Code: 05676
Country: USA
Contact_Voice_Telephone: 802/882-3000
Contact_TDD/TTY_Telephone: None
Contact_Facsimile_Telephone: 802/882-3001
Metadata_Standard_Name: FGDC Content Standards for Digital Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: Local time
Metadata_Access_Constraints: None
Metadata_Use_Constraints: None
Metadata_Security_Information:
Metadata_Security_Classification_System: N/A
Metadata_Security_Classification: Unclassified
Metadata_Security_Handling_Description: No security considerations

Generated by mp version 2.9.5 on Wed Mar 05 12:07:27 2008