Raster Dataset

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US, Rainfall, Precipitation


This layer contains the average annual pricipitation for the US. This raster file was designed for small to medium scale thematic mapping and analysis.



The spatial data were obtained from the PRISM Climate Group and are current as of 2010. This dataset is comprised of Monthly 30-year "normal" precipitation data covering the conterminous U.S., averaged over the climatological period 1981-2010. Contains spatially gridded average annual precipitation at 4km grid cell resolution. Distribution of the point measurements to the spatial grid was accomplished using the PRISM model, developed and applied by Dr. Christopher Daly of the PRISM Climate Group at Oregon State University.


Center for Geospatial Technology, Texas Tech University
PRISM Climate Group

Use limitations


West  -125.020833    East  -66.479167
North  49.937500    South  24.062500

Scale Range
Maximum (zoomed in)  1:5,000
Minimum (zoomed out)  1:150,000,000

ArcGIS Metadata 

Topics and Keywords 

*Content type  Downloadable Data


*Title us_annualppt

Presentation formats* digital map

Resource Details 

Dataset languages* English (UNITED STATES)

Spatial representation type* grid

*Processing environment Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS

Center for Geospatial Technology, Texas Tech University
PRISM Climate Group

ArcGIS item properties
*Name us_annualppt
*Location file://\\cgstdb\CGSTGeognet\Geognet\Geognet2014\USLayers2014\US_Climate\us_annualppt
*Access protocol Local Area Network


Geographic extent
Bounding rectangle
Extent type  Extent used for searching
*West longitude -125.020833
*East longitude -66.479167
*North latitude 49.937500
*South latitude 24.062500
*Extent contains the resource Yes

Extent in the item's coordinate system
*West longitude -125.020833
*East longitude -66.479167
*South latitude 24.062500
*North latitude 49.937500
*Extent contains the resource Yes

Spatial Reference 

ArcGIS coordinate system
*Type Geographic
*Geographic coordinate reference GCS_WGS_1984
*Coordinate reference details
Geographic coordinate system
Well-known identifier 4326
X origin -400
Y origin -400
XY scale 11258999068426.238
Z origin -100000
Z scale 10000
M origin -100000
M scale 10000
XY tolerance 8.983152841195215e-009
Z tolerance 0.001
M tolerance 0.001
High precision true
Left longitude -180
Latest well-known identifier 4326
Well-known text GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433],METADATA["World",-180.0,-90.0,180.0,90.0,0.0,0.0174532925199433,0.0,1262],AUTHORITY["EPSG",4326]]

Reference system identifier
*Value 4326
*Codespace EPSG
*Version 8.2.6

Spatial Data Properties 

Georectified Grid
*Number of dimensions 2

Axis dimensions properties
Dimension type  column (x-axis)
*Dimension size 7025
*Resolution  0.008333 Degree

Axis dimensions properties
Dimension type  row (y-axis)
*Dimension size 3105
*Resolution  0.008333 Degree

*Cell geometry  area
*Point in pixel  center

*Transformation parameters are available Yes

*Check points are available No

Corner points
*Point -125.020833 24.062500
*Point -125.020833 49.937500
*Point -66.479167 49.937500
*Point -66.479167 24.062500

*Center point -95.750000 37.000000

ArcGIS Raster Properties
General Information
*Pixel depth 16
*Compression type RLE
*Number of bands 1
*Raster format GRID
*Source type continuous
*Pixel type signed integer
*No data value -32768
*Has colormap No
*Has pyramids Yes

Spatial Data Content 

Image Description
*Type of information  physical measurement

Band information
*Description US_AnnualPppt
*Maximum value 6640.000000
*Minimum value 46.000000
*Number of bits per value 16


Distribution format
*Name Raster Dataset


Details for object us_annualppt.vat 
*Type Table
*Row count 5308

Field Rowid
*Alias Rowid
*Data type OID
*Width 4
*Precision 0
*Scale 0
*Field description
Internal feature number.

*Description source

*Description of values
Sequential unique whole numbers that are automatically generated.

*Alias VALUE
*Data type Integer
*Width 4
*Precision 0
*Scale 0

*Alias COUNT
*Data type Integer
*Width 4
*Precision 0
*Scale 0

Metadata Details 

*Metadata language English (UNITED STATES)
*Metadata character set  utf8 - 8 bit UCS Transfer Format

Scope of the data described by the metadata* dataset
Scope name* dataset

*Last update 2014-12-11

ArcGIS metadata properties
Metadata format ArcGIS 1.0
Metadata style Item Description
Standard or profile used to edit metadata ItemDescription

Created in ArcGIS for the item 2014-12-11 09:17:06
Last modified in ArcGIS for the item 2014-12-11 93:44:80

Automatic updates
Have been performed Yes
Last update 2014-12-11 09:17:06

FGDC Metadata (read-only) 

Entities and Attributes