A line on a floodplain map indicating the discharges, water surface elevations and floodway encroachment widths that have been calculated for that section of the stream and floodplain. These values are used for regulating floodplain development in accordance with local, State and Federal standards.
Cross sections are vector features seen on a floodplain map to indicate sections of the stream and floodplain where known discharges, water surface elevations and floodway encroachment widths have been calculated. Floodplain boundaries are determined by creating vertices where water surface elevations indicated by the cross sections are equal to the modeled ground surface. In between cross sections, additional vertices are drawn for water surface elevations that are derived via interpolation based upon the distance from the bounding cross sections upstream and downstream of a given point.
FEMA
Mecklenburg County shall not be held liable for any errors in these data. This includes errors of omission, commission, errors concerning the content of the data, and relative and positional accuracy of the data. These data cannot be construed to be a legal document. Primary sources from which these data were compiled must be consulted for verification of information contained in these data. These data cannot be resold in their present form.
There is no extent for this item.
| Maximum (zoomed in) | 1:5,000 |
| Minimum (zoomed out) | 1:150,000,000 |
FEMA
Charlotte Mecklenburg Storm Water Services
Mecklenburg County GIS
Dataset represents extent of flood Cross Section in Mecklenburg County, NC
This dataset is updated with all FEMA map changes including: LOMR, PMR and Countywide updates.
Mecklenburg County shall not be held liable for any errors in these data. This includes errors of omission, commission, errors concerning the content of the data, and relative and positional accuracy of the data. These data cannot be construed to be a legal document. Primary sources from which these data were compiled must be consulted for verification of information contained in these data. These data cannot be resold in their present form.
Mecklenburg County shall not be held liable for any errors in these data. This includes errors of omission, commission, errors concerning the content of the data, and relative and positional accuracy of the data. These data cannot be construed to be a legal document. Primary sources from which these data were compiled must be consulted for verification of information contained in these data. These data cannot be resold in their present form.
Cross Sections file for floodplain mapping, analysis and assessment.
Mecklenburg County GIS
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Used as a unique identifier to label Cross Sections on FEMA map products. Represents the stationing value divided by 100.
FEMA Flood Insurance Study
String created to label Cross Sections with 1% Annual Chance flood elevations for Existing and Future conditions: CalculateField "Cross Sections" labelfield "Existing 100 = "&[x00_year_e]&", Future 100 = "&[x00_year_f] VB #
Mecklenburg County GIS
Used as a unique identifier to label Cross Sections on FEMA map products. Represents the stationing value divided by 100.
FEMA Flood Insurance Study
Distance upstream from the origin of the stream centerline in linear feet.
FEMA Flood Insurance Study
Name of the stream that each Cross Section feature crosses.
FEMA Flood Insurance Study
1% Annual Chance flood elevation (in CFS) that is modeled based on the Existing land use scenario in place when modeling occurs.
FEMA Flood Insurance Study
1% Annual Chance flood discharges (in CFS) that is modeled based on a Future land use scenario that is more built out than existing conditions.
FEMA Flood Insurance Study
1% Annual Chance flood elevation (in NAVD 88) that is modeled based on the Existing land use scenario in place when modeling occurs. Also known as the 100 Year Floodplain or FEMA Floodplain.
FEMA Flood Insurance Study
1% Annual Chance flood elevation (in NAVD 88) that is modeled based on a Future land use scenario that is more built out than existing conditions. Also known as the 100 Year Future Floodplain or Community Floodplain.
FEMA Flood Insurance Study
The width along the Cross Section from the stream centerline to the FEMA Floodway boundary as measured to the left of the stream from a downstream facing perspective.
FEMA Flood Insurance Study
The width along the Cross Section from the stream centerline to the FEMA Floodway boundary as measured to the right of the stream from a downstream facing perspective.
FEMA Flood Insurance Study
The width along the Cross Section from the stream centerline to the Community Encroachment Area boundary as measured to the left of the stream from a downstream facing perspective.
FEMA Flood Insurance Study
The width along the Cross Section from the stream centerline to the Community Encroachment Area boundary as measured to the right of the stream from a downstream facing perspective.
FEMA Flood Insurance Study
Refers to profile page number in Flood Insurance Study report.
Mecklenburg County GIS
Feature geometry.
ESRI
Coordinates defining the features.
Hyperlink to HEC models used in generation of Cross Section data
Mecklenburg County GIS
Feature length in linear feet
ESRI