11. Provided Grids

Polar2Grid allows users to remap to one or more projected grids. A grid defines the uniform geographic area that an output image covers. Polar2Grid comes with various grids to choose from that should suit most users and their use cases. Some grids are provided for specific writers (like AWIPS), but can be used for other writers as well. For those cases that the provided grids aren't enough it is possible to create your own custom grids. See the Custom Grids documentation for help with this.

Below are descriptions for a few of the grids provided with Polar2Grid. For information on all of the grids provided by Polar2Grid see the Grids Configuration File.

The grids' projections are defined using PROJ.4. Go to PROJ.4 GenParams for more information on what each projection parameter means.

Note

If the grid does not have a parameter specified it will be derived from the data during remapping. This allows for grids that fit to the data (dynamic grids).

11.1. WGS84 Dynamic Fit

Grid Name:wgs84_fit
Description:Longitude/Latitude WGS84 Grid
PROJ.4 String:+proj=latlong +datum=WGS84 +ellps=WGS84 +no_defs
Grid Width:None
Grid Height:None
X Pixel Size:0.0057 degrees
Y Pixel Size:0.0057 degrees
X Origin:None
Y Origin:None

11.2. WGS84 Dynamic Fit 250m

Grid Name:wgs84_fit_250
Description:Longitude/Latitude WGS84 Grid at ~250m resolution
PROJ.4 String:+proj=latlong +datum=WGS84 +ellps=WGS84 +no_defs
Grid Width:None
Grid Height:None
X Pixel Size:0.00225 degrees
Y Pixel Size:0.00225 degrees
X Origin:None
Y Origin:None

11.3. Lambert Conic Conformal Dynamic Fit

Grid Name:lcc_fit
Description:1km East CONUS centered lcc grid (alias: lcc_na)
PROJ.4 String:+proj=lcc +datum=WGS84 +ellps=WGS84 +lat_0=25 +lon_0=-95
Grid Width:None
Grid Height:None
X Pixel Size:1000 meters
Y Pixel Size:1000 meters
X Origin:None
Y Origin:None

11.4. High Resolution Lambert Conic Conformal Dynamic Fit

Grid Name:lcc_fit_hr
Description:400m East CONUS centered lcc grid
PROJ.4 String:+proj=lcc +datum=WGS84 +ellps=WGS84 +lat_0=25 +lon_0=-95
Grid Width:None
Grid Height:None
X Pixel Size:400 meters
Y Pixel Size:400 meters
X Origin:None
Y Origin:None

11.5. Lambert Conic Conformal - South America Centered

Grid Name:lcc_sa
Description:1km South America centered lcc grid
PROJ.4 String:+proj=lcc +datum=WGS84 +ellps=WGS84 +lat_0=-25 +lat_1=-25 +lon_0=-55 +units=m +no_defs
Grid Width:None
Grid Height:None
X Pixel Size:1000 meters
Y Pixel Size:1000 meters
X Origin:None
Y Origin:None

11.6. Lambert Conic Conformal - Europe Centered

Grid Name:lcc_eu
Description:1km Europe centered lcc grid
PROJ.4 String:+proj=lcc +datum=WGS84 +ellps=WGS84 +lat_0=25 +lat_1=25 +lon_0=15 +units=m +no_defs
Grid Width:None
Grid Height:None
X Pixel Size:1000 meters
Y Pixel Size:1000 meters
X Origin:None
Y Origin:None

11.7. Lambert Conic Conformal - South Africa Centered

Grid Name:lcc_south_africa
Description:1km South Africa centered lcc grid
PROJ.4 String:+proj=lcc +datum=WGS84 +ellps=WGS84 +lat_0=-25 +lat_1=-25 +lon_0=25 +units=m +no_defs
Grid Width:None
Grid Height:None
X Pixel Size:1000 meters
Y Pixel Size:1000 meters
X Origin:None
Y Origin:None

11.8. Lambert Conic Conformal - Australia Centered

Grid Name:lcc_aus
Description:1km Australia centered lcc grid
PROJ.4 String:+proj=lcc +datum=WGS84 +ellps=WGS84 +lat_0=-25 +lat_1=-25 +lon_0=135 +units=m +no_defs
Grid Width:None
Grid Height:None
X Pixel Size:1000 meters
Y Pixel Size:1000 meters
X Origin:None
Y Origin:None

11.9. Lambert Conic Conformal - Asia Centered

Grid Name:lcc_sa
Description:1km Asia centered lcc grid
PROJ.4 String:+proj=lcc +datum=WGS84 +ellps=WGS84 +lat_0=25 +lat_1=25 +lon_0=105 +units=m +no_defs
Grid Width:None
Grid Height:None
X Pixel Size:1000 meters
Y Pixel Size:1000 meters
X Origin:None
Y Origin:None

11.10. Polar-Stereographic North Pacific

Grid Name:polar_north_pacific
Description:400m Northern Pacific Grid
PROJ.4 String:+proj=stere +datum=WGS84 +ellps=WGS84 +lat_0=90 +lat_ts=45.0 +lon_0=-170
Grid Width:None
Grid Height:None
X Pixel Size:400 meters
Y Pixel Size:400 meters
X Origin:None
Y Origin:None

11.11. Polar-Stereographic South Pacific

Grid Name:polar_south_pacific
Description:400m Southern Pacific Grid
PROJ.4 String:+proj=stere +datum=WGS84 +ellps=WGS84 +lat_0=-90 +lat_ts=-45.0 +lon_0=-170
Grid Width:None
Grid Height:None
X Pixel Size:400 meters
Y Pixel Size:400 meters
X Origin:None
Y Origin:None

11.12. Polar-Stereographic Alaska

Grid Name:polar_alaska
Description:400m Northern Grid over Alaska
PROJ.4 String:+proj=stere +datum=WGS84 +ellps=WGS84 +lat_0=90 +lat_ts=60.0 +lon_0=-150
Grid Width:None
Grid Height:None
X Pixel Size:400 meters
Y Pixel Size:400 meters
X Origin:None
Y Origin:None

11.13. Polar-Stereographic Canada

Grid Name:polar_canada
Description:1km Northern Grid over Canada
PROJ.4 String:+proj=stere +datum=WGS84 +ellps=WGS84 +lat_0=90 +lat_ts=45.0 +lon_0=-150
Grid Width:None
Grid Height:None
X Pixel Size:1000 meters
Y Pixel Size:1000 meters
X Origin:None
Y Origin:None

11.14. Polar-Stereographic Russia

Grid Name:polar_russia
Description:400m Northern Grid over Russia
PROJ.4 String:+proj=stere +datum=WGS84 +ellps=WGS84 +lat_0=90 +lat_ts=45.0 +lon_0=50
Grid Width:None
Grid Height:None
X Pixel Size:400 meters
Y Pixel Size:400 meters
X Origin:None
Y Origin:None

11.15. Equirectangular Fit

Grid Name:eqc_fit
Description:250m Grid centered over -100 longitude
PROJ.4 String:+proj=eqc +datum=WGS84 +ellps=WGS84 +lat_ts=0 +lon_0=-100 +units=m +no_defs
Grid Width:None
Grid Height:None
X Pixel Size:250 meters
Y Pixel Size:250 meters
X Origin:None
Y Origin:None