RSEI Data Dictionary: Shapefiles (Grid geography)
The following tables provide descriptions for each field in each table. Note that for the Microdata, "Other Geographies" includes block groups, census tracts, and ZIP code files. For more information, see the RSEI methodology document and the RSEI Microdata documentation.
RSEI shapefiles define the grid and can be used for mapping. They do not contain any RSEI results. New shapefiles were posted on the RSEI ftp site in early 2017. The shapes are the same as previous to 2017; however, the fields and format are different, and now additional files for grid cell sizes other than 810m are available. The attribute table is the same for all shapefiles. More information on the RSEI grid can be found in the RSEI methodology document.
Attribute Table for Grid Shapefiles(Current version, e.g., poly_gc14_conus_810m_bottom.dbf) |
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|---|---|
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Variable |
Description |
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CELLX |
Assigned grid cell value based on latitude. |
|
CELLY |
Assigned grid cell value based on longitude. |
|
CLAT |
Latitude for the center point of grid cell. |
|
CLONG |
Longitude for center point of grid cell. |
|
CX |
Vertical distance from the grid center point to grid cell (m). Equivalent to CELLX*grid size (m) (for standard RSEI grid, CELLX*810). |
|
CY |
Horizontal distance from the grid center point to grid cell (m). Equivalent to CELLY*grid size (m) (for standard RSEI grid, CELLY*810). |
Attribute Table for Grid Shapefiles(Older version, e.g. ConUS_810m_1) |
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|---|---|
|
Variable |
Description |
|
X |
Assigned grid cell value based on latitude. |
|
Y |
Assigned grid cell value based on longitude. |
|
LONGX |
Easting coordinate for Albers projection. |
|
LATY |
Northing coordinate for Albers projection. |
|
LONGITUDE |
Longitude for center point of grid cell. |
|
LATITUDE |
Latitude for center point of grid cell. |
|
RADIALDIST |
Radial distance from center point of grid (m). |
|
AREA |
Area of grid (m) (note that grid cells vary slightly in size). |
|
NORTHADJ |
Internal. |