Flood 2013 Inundated Area

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Frequently anticipated questions:

What does this data set describe?

Title: Flood 2013 Inundated Area
The original source was the inundated areas as drawn by the National Geospatial Agency, which only covered major flooding along Boulder Creek and St Vrain Creek. This was supplemented by Boulder County Land Use and Parks and Open Space using imagery from the Digital Globe First Look product. Multiple images, taken on different days were used to determine the high water mark due to cloud cover. The high water mark has not been field verified. Inundated areas in the mountains were particularlly difficult to draw due to cloud and tree cover. Areas within the City of Longmont and Boulder were not drawn as it is assumed these cities will be creating their own layer. Areas within the other incorporated areas were drawn: Jamestown, Lyons, Louisville, Lafayette, and Erie. This dataset has further been refined by using Pictometry imagery flown October 2013 after the flood and using damage assessment data points. This dataset is updated as of 8/6/2014.
  1. How should this data set be cited?

    , Flood 2013 Inundated Area.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -105.363363
    East_Bounding_Coordinate: -105.076497
    North_Bounding_Coordinate: 40.230474
    South_Bounding_Coordinate: 40.081132

  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?

    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):

      • GT-polygon composed of chains (37)

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

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 8.983152841195215e-009. Longitudes are given to the nearest 8.983152841195215e-009. Latitude and longitude values are specified in Decimal Degrees.

      The horizontal datum used is D WGS 1984.
      The ellipsoid used is WGS 1984.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257223563.

  7. How does the data set describe geographic features?


    Internal feature number. (Source: Esri)

    Sequential unique whole numbers that are automatically generated.

    Feature geometry. (Source: Esri)

    Coordinates defining the features.

    USGS Stream name that likely caused the inundation (Source: USGS, Land Use)

    Land Use staff who performed the edits (Source: Land Use)

    Date feature was updated/edited (Source: Land Use)

    Length of feature in internal units. (Source: Esri)

    Positive real numbers that are automatically generated.

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

    Positive real numbers that are automatically generated.

Who produced the data set?

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

  2. Who also contributed to the data set?

    Boulder County Land Use

  3. To whom should users address questions about the data?

    Boulder County Land Use Department
    2045 13th Street, PO Box 471
    Boulder, CO 80503

    303-441-3930 (voice)

Why was the data set created?

For cartographic and analytic purposes to show the inundated high water maker for the Boulder County flood of September 2013.

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?

How can someone get a copy of the data set?

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

Access_Constraints: None
This data is for illustrative purposes only and the features depicted on it are approximate. More site specific studies may be required to draw accurate conclusions. Boulder County makes no warranties regarding the accuracy, completeness, reliability, or suitability of this data. Boulder County disclaims any liability associated with the use or misuse of this data. In accessing and/or relying on this data, the user fully assumes any and all risk associated with the information contained therein.

Who wrote the metadata?

Last modified: 11-Aug-2014
Metadata author:
Boulder County Land Use Department
2045 13th Street, PO Box 471
Boulder, CO 80503

303-441-3930 (voice)

Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

Generated by mp version 2.9.12 on Mon Aug 11 16:14:49 2014