FEMA Framework Basemap datasets comprise six of the seven FGDC themes of geospatial data that are used by most GIS applications
(Note: the seventh framework theme, orthographic imagery, is packaged in a separate NFIP Metadata Profile): cadastral, geodetic
control, governmental unit, transportation, general structures, hydrography (water areas & lines). These data include an encoding
of the geographic extent of the features and a minimal number of attributes needed to identify and describe the features.
(Source: Circular A16, p. 13)
Citation
Title BASEMAP, COVINGTON COUNTY, MS
publication Date
2006-08-04
presentationForm
FGDC-FRAMEWORK-BASEMAP
cited responsible party
-
publisher
organisation Name
Federal Emergency Management Agency
Contact information
Address
, Jackson, MS
cited responsible party
-
originator
organisation Name
MARIS
cited responsible party
-
originator
organisation Name
Federal Emergency Management Agency
The Basemap datasets reflect the reference features (i.e., roads, streets, hydrographic features, political jurisdiction boundaries)
needed by users to locate properties on FIRMs. (Source: Guidelines and Specifications Vol 1, p. 68)
Resource language:
eng; USA
Resource progress code:
underDevelopment
Resource Maintenance Information
maintenance or update frequency:
unknown
Constraints on resource usage:
Constraints
Use limitation statement:
The information contained on this website and data distributed by the Board of Trustees / Institutions of Higher Learning's
MARIS Technical Center (MTC) is derived from a variety of public and private sector sources considered to be dependable, but
the accuracy, completeness, and currency thereof are not guaranteed. The IHL/MTC makes no warranties, expressed or implied
as to the accuracy, completeness, currency, reliability, or suitability for any particular purpose of information or data
contained in or generated from the state geographic database. Additionally, the State of Mississippi, the Board of Trustees
for IHL or any employee thereof assume no liability associated with the use of these data, and assume no responsibility to
maintain them in any manner or form.
Constraints on resource usage:
Legal Constraints
use constraint:
otherRestrictions
Other constraints
Use Constraints: Acknowledgement of FEMA would be appreciated in products derived from these data. This digital data is produced
for the purposes of updating/creating a DFIRM database.
name Of Measure Horizontal Positional Accuracy Report
evaluation Method Description
The NSSDA is used to report the horizontal accuracy of the base map data used by FEMA to produce a FIRM. The NSSDA uses radial
accuracy (Accuracy) to report the radius of a circle of uncertainty, such that the true or theoretical location of a point
falls within that circle 95 percent of the time. (Guidelines and Specifications Vol 1, p. 70)
AbsoluteExternalPositionalAccuracy
name Of Measure Horizontal Positional Accuracy
measure Description
The minimum horizontal positional accuracy for new FIRM base map data is that of the default base map, the USGS DOQs, which
have an NSSDA radial accuracy of 38 feet. Data that meet higher accuracy standards are also acceptable. Accuracy of 38 feet
is the same as radial root mean square error (RMSEr) of 22 feet. (Guidelines and Specifications Vol 1, p. 70)
Quantitative Result
result value 11.5824
value Units
Completeness Commission
evaluation Method Description
The Basemap datasets represents all the features utilized during the study mapping process to spatially position the DFIRM
information and highlights the specific prioritization process laid out in the Guidelines and Specifications Vol 1, p. 69
in their selection for use. The final selection criteria, and rational for inclusion should be outlined here, along with rational
for exclusion of use of specific base map datasets if applicable.
Completeness Omission
evaluation Method Description
The Basemap datasets represents all the features utilized during the study mapping process to spatially position the DFIRM
information and highlights the specific prioritization process laid out in the Guidelines and Specifications Vol 1, p. 69
in their selection for use. The final selection criteria, and rational for inclusion should be outlined here, along with rational
for exclusion of use of specific base map datasets if applicable.
ConceptualConsistency
measure Description
Polygons intersecting the neatline are closed along the border. Segments making up the outer and inner boundaries of a polygon
tie end-to-end to completely enclose the area. Line segments are a set of sequentially numbered coordinate pairs. No duplicate
features exist nor duplicate points in a data string. Intersecting lines are separated into individual line segments at the
point of intersection. Point data are represented by two sets of coordinate pairs, each with the same coordinate values. Tests
for logical consistency are performed by DFIRM tools topology verification software.
Data requests must include the full name of the community or county and the FIRM panel number(s) or the 7.5- minute series
quadrangle sheet area(s) covered by the request.
notes: This metadata was automatically generated from the FGDC Content Standards for Digital Geospatial Metadata standard (version
FGDC-STD-001-1998) using the 2012-06-20T17:21:00 version of the FGDC RSE to ISO 19115-2 transform.
Metadata contact
-
pointOfContact
individual Name Jamie Monohan
organisation Name
Waggoner Engineering, Inc.
Contact information
Telephone
Voice 601-355-9526
Address
143-A LeFleurs Square, Jackson, Mississippi, 39211
Country USA