Digital Flood Insurance Rate Map - 2002 Restudy

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How should this data set be cited?

   FEMA, September 27, 2002, Digital Flood Insurance Rate Map - 2002 Restudy: Unknown Unknown, FEMA, Unknown.

   Online Links:

   • <ftp://www.ccrfcd.org/Shapefiles>

   Other_Citation_Details: Created by Michael Baker, Inc. for FEMA

   This is part of the following larger work.

   FEMA, Unknown, Digital Flood Insurance Rate Map - 2002 Restudy: Unknown Unknown, Unknown, Unknown.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -115.898909

   East_Bounding_Coordinate: -114.030955

   North_Bounding_Coordinate: 36.856307

   South_Bounding_Coordinate: 34.996083

3. What does it look like?

   <http://www.ccrfcd.org/images/gis_metadata/dfirm02.jpg> (JPEG)

   Digital Flood Insurance Rate Map - 2002 Restudy

4. Does the data set describe conditions during a particular time period?

   Calendar_Date: September 27, 2002

   Time_of_Day: unknown

   Currentness_Reference: ground condition

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: vector digital data

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):

      • G-polygon (949)
      • Label point (952)
      • GT-polygon composed of chains (949)
      • Point (1)

   2. What coordinate system is used to represent geographic features?

      The map projection used is Transverse Mercator.

      Projection parameters:

      Scale_Factor_at_Central_Meridian: 0.999900

      Longitude_of_Central_Meridian: -115.583333

      Latitude_of_Projection_Origin: 34.750000

      False_Easting: 656166.666667

      False_Northing: 26246666.666667

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000328
      Ordinates (y-coordinates) are specified to the nearest 0.000328
      Planar coordinates are specified in survey feet

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.
      

      Vertical_Coordinate_System_Definition:

      Altitude_System_Definition:

      Altitude_Resolution: 1.000000

      Altitude_Encoding_Method:

      Explicit elevation coordinate included with horizontal coordinates

7. How does the data set describe geographic features?

   gismo.RFCGIS.dfirm02_p

   Line featureset

   OBJECTID

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   gismo.RFCGIS.dfirm02_p.AREA

   Shape

   Feature geometry. (Source: ESRI)

   Coordinates defining the features.

   PERIMETER

   DFIRM02_

   DFIRM02_ID

   VEL_UNITS

   Units of Velocity (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   FLD_AR_ID

   Undocumented (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   FLD_ZONE

   Flood Zone Category (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   Value	Definition
   0.2 PCT Annual Chance Flood Hazard	500-Year Flood Zone
   A	100-year flood zone (FEMA code 152)
   AE	100-year flood zone (FEMA code 153)
   AO	100-year flood zone (FEMA code 154)
   D	Unstudied area (FEMA code 158)
   X	FEMA Code 161

   FLOODWAY

   Floodway polygon (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   Value	Definition
   Floodway	Polygon is a floodway

   SFHA_TF

   Undocumented (Source: Michael Baker, Inc)

   STATIC_BFE

   Base Flood Elevation (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   V_DATUM

   Vertical Datum (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   DEPTH

   Depth (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   LEN_UNIT

   Length Unit (Source: Michael Baker, Inc.)

   Frequency of measurement: Unknown

   VELOCITY

   Velocity (Source: Michael Baker, Inc.)

   Frequency of measurement: Unknown

   VEL_UNIT

   Velocity Unit (Source: Michael Baker, Inc.)

   Frequency of measurement: Unknown

   AR_REVERT

   Undocumented (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   BFE_REVERT

   Undocumented (Source: Michael Baker, Inc.)

   Frequency of measurement: Unknown

   DEP_REVERT

   Undocumented (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   SOURCE_CIT

   Source Citation (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   Shape.area

   Shape.len

   dfirm02.pat

   Polygon featureset

   FID

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   Shape

   Feature geometry. (Source: ESRI)

   Coordinates defining the features.

   AREA

   Area of feature in internal units squared. (Source: ESRI)

   Positive real numbers that are automatically generated.

   PERIMETER

   Perimeter of feature in internal units. (Source: ESRI)

   Positive real numbers that are automatically generated.

   DFIRM02#

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   DFIRM02-ID

   User-defined feature number. (Source: ESRI)

   VEL_UNITS

   Measure of velocity (Source: Michael Baker, Inc.)

   Frequency of measurement: None planned

   FLD_AR_ID

   Unknown (Source: MIchael Baker, Inc.)

   Frequency of measurement: Unknown

   FLD_ZONE

   Flood zone indicator (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   Value	Definition
   A	100-year flood zone
   AE	100-year flood zone (floodway)
   AH	100-year flood zone
   AO	100-year flood zone
   D	Possible but undetermined flood zone hazard
   X	Outside of the 100-year flood zone
   0.2 Pct Annual Chance Flood Hazard	500-year flood zone

   FLOODWAY

   AE Zone (in a floodway?) (Source: Michael Baker, Inc.)

   SFHA_TF

   In a floodzone (T or F) ? (Source: Michael Baker, Inc.)

   Frequency of measurement: Unknown

   STATIC_BFE

   base flood elevation (Source: Michael Baker, Inc.)

   Frequency of measurement: Unknown

   V_DATUM

   Source of Vertical Datum (Source: Michael Baker, Inc.)

   Frequency of measurement: Unknown

   DEPTH

   Unknown (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   LEN_UNIT

   Measurement of length (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   VELOCITY

   Measured velocity of flow (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   VEL_UNIT

   Units of velocity measured (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   AR_REVERT

   Unknown (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   BFE_REVERT

   Unknown (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   DEP_REVERT

   Unknown (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   SOURCE_CIT

   Citation source (Source: Michael Baker, Inc)

   Frequency of measurement: Unknown

   Entity_and_Attribute_Overview:

   Use the fld_zone field to display flood zones. Most fields are undocumented.

   Entity_and_Attribute_Detail_Citation: Documentation not provided by FEMA or Michael Baker, Inc.

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • FEMA

2. Who also contributed to the data set?

   Michael Baker, Inc for FEMA

3. To whom should users address questions about the data?
   Clark County Regional Flood Control District
   Systems Administrator
   600 S. Grand Central Pkwy
   Las Vegas, Nevada 89106-4511
   USA
   

   702-685-0000 (voice)
   702-685-0001 (FAX)
   Administrator@regionalflood.org
   

   Hours_of_Service: 8:00 A.M. to 5:00 P.M. (Pacific Standard Time)

Why was the data set created?

This dataset can be used for the general mapping and feature identification of 100-year flood zones determined by a 2002 flood insurance restudy of Clark County, Nevada. This dataset represents 100-year flood zones as of September, 2002 but does not reflect changes to the 100-year flood zones through letter of map revisions after that date.

How was the data set created?

1. From what previous works were the data drawn?

   (source 1 of 1)

   , None: None.

2. How were the data generated, processed, and modified?

   (process 1 of 3)

   Metadata imported.

   Person who carried out this activity:
   

   Clark County Regional Flood Control District
   Systems Administrator
   600 S. Grand Central Pkwy
   Las Vegas, Nevada 89106-4511
   USA
   

   702-685-0000 (voice)
   702-685-0001 (FAX)
   Administrator@regionalflood.org
   

   Hours_of_Service: 8:00 A.M. to 5:00 P.M. (Pacific Standard Time)

   Data sources used in this process:

   • T:\RFCD\Metadata\crflood_template.xml

   (process 2 of 3)

   Metadata imported.

   Data sources used in this process:

   • T:\RFCD\Metadata\crflood_template.xml

   (process 3 of 3)

   Metadata imported.

3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

1. How well have the observations been checked?

   None

2. How accurate are the geographic locations?

   None

3. How accurate are the heights or depths?

   None

4. Where are the gaps in the data? What is missing?

   None

5. How consistent are the relationships among the observations, including topology?

   None

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: None

Use_Constraints: None

1. Who distributes the data set? (Distributor 1 of 1)
   Federal Emergency Management Agency
   Unknown
   

2. What's the catalog number I need to order this data set?

   Downloadable Data

3. What legal disclaimers am I supposed to read?

   none

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	Size: 7.689
     Network links:	<ftp://www.ccrfcd.org/Shapefiles>
     Media you can order:	None

   • Cost to order the data: None

   • How long will it take to get the data?

     None

5. Is there some other way to get the data?

   none

6. What hardware or software do I need in order to use the data set?

   none

Who wrote the metadata?

Dates:

Last modified: 01-Jun-2009

Metadata author:

Clark County Regional Flood Control District
Systems Administrator
600 S. Grand Central Pkwy
Las Vegas, Nevada 89106-4511
USA

702-685-0000 (voice)
702-685-0001 (FAX)
Administrator@regionalflood.org

Hours_of_Service: 8:00 A.M. to 5:00 P.M. (Pacific Standard Time)

Metadata standard:

FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

Metadata extensions used:

• <http://www.esri.com/metadata/esriprof80.html>