10. 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 Tiled AWIPS), but can be used for other writers as well. Users can also specify their own custom grids. See the Custom Grids documentation for help with this.

10.1. Provided Grids

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 YAML File.

The grids’ projections are defined using PROJ.4. Go to the PROJ documentation 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).

10.1.1. WGS84 Dynamic Fit

Grid Name

wgs84_fit

Description

Longitude/Latitude WGS84 Grid

Projection

EPSG:4326

Resolution

0.0057 degrees

10.1.2. WGS84 Dynamic Fit 250m

Grid Name

wgs84_fit_250

Description

Longitude/Latitude WGS84 Grid at ~250m resolution

Projection

EPSG:4326

Resolution

0.00225 degrees

10.1.3. Lambert Conic Conformal Dynamic Fit

Grid Name

lcc_fit

Description

1km East CONUS centered lcc grid (alias: lcc_na)

Projection

+proj=lcc +lat_1=25 +lat_0=25 +lon_0=-95 +datum=WGS84 +units=m +no_defs +type=crs

Resolution

1000.0 meters

10.1.4. Lambert Conic Conformal - South America Centered

Grid Name

lcc_sa

Description

1km South America centered LCC grid

Projection

+proj=lcc +lat_1=-25 +lat_0=-25 +lon_0=-55 +datum=WGS84 +units=m +no_defs +type=crs

Resolution

1000.0 meters

10.1.5. Lambert Conic Conformal - Europe Centered

Grid Name

lcc_eu

Description

1km Europe centered LCC grid

Projection

+proj=lcc +lat_1=25 +lat_0=25 +lon_0=15 +datum=WGS84 +units=m +no_defs +type=crs

Resolution

1000.0 meters

10.1.6. Lambert Conic Conformal - South Africa Centered

Grid Name

lcc_south_africa

Description

1km South Africa centered LCC grid

Projection

+proj=lcc +lat_1=-25 +lat_0=-25 +lon_0=25 +datum=WGS84 +units=m +no_defs +type=crs

Resolution

1000.0 meters

10.1.7. Lambert Conic Conformal - Australia Centered

Grid Name

lcc_aus

Description

1km Australia centered LCC grid

Projection

+proj=lcc +lat_1=-25 +lat_0=-25 +lon_0=135 +datum=WGS84 +units=m +no_defs +type=crs

Resolution

1000.0 meters

10.1.8. Lambert Conic Conformal - Asia Centered

Grid Name

lcc_asia

Description

1km Asia centered LCC grid

Projection

+proj=lcc +lat_1=25 +lat_0=25 +lon_0=105 +datum=WGS84 +units=m +no_defs +type=crs

Resolution

1000.0 meters

10.1.9. High Resolution Lambert Conic Conformal Dynamic Fit

Grid Name

lcc_fit_hr

Description

400m East CONUS centered LCC grid

Projection

+proj=lcc +lat_1=25 +lat_0=25 +lon_0=-95 +datum=WGS84 +units=m +no_defs +type=crs

Resolution

400.0 meters

10.1.10. Equirectangular Fit

Grid Name

eqc_fit

Description

250m Equirectangular grid

Projection

+proj=eqc +lat_ts=0 +lat_0=0 +lon_0=0 +datum=WGS84 +units=m +no_defs +type=crs

Resolution

250.0 meters

10.1.11. Polar-Stereographic Canada

Grid Name

polar_canada

Description

1km Polar-stereographic Canada centered grid

Projection

+proj=stere +lat_0=90 +lat_ts=45 +lon_0=-150 +datum=WGS84 +units=m +no_defs +type=crs

Resolution

1000.0 meters

10.1.12. Polar-Stereographic North Pacific

Grid Name

polar_north_pacific

Description

400m Polar-stereographic North Pacific centered grid

Projection

+proj=stere +lat_0=90 +lat_ts=45 +lon_0=-170 +datum=WGS84 +units=m +no_defs +type=crs

Resolution

400.0 meters

10.1.13. Polar-Stereographic South Pacific

Grid Name

polar_south_pacific

Description

400m Polar-stereographic South Pacific centered grid

Projection

+proj=stere +lat_0=-90 +lat_ts=-45 +lon_0=-170 +datum=WGS84 +units=m +no_defs +type=crs

Resolution

400.0 meters

10.1.14. Polar-Stereographic Russia

Grid Name

polar_russia

Description

400m Polar-stereographic Russia centered grid

Projection

+proj=stere +lat_0=90 +lat_ts=45 +lon_0=50 +datum=WGS84 +units=m +no_defs +type=crs

Resolution

400.0 meters

10.1.15. Polar-Stereographic Alaska

Grid Name

polar_alaska

Description

400m Polar-stereographic Alaska centered grid

Projection

+proj=stere +lat_0=90 +lat_ts=60 +lon_0=-150 +datum=WGS84 +units=m +no_defs +type=crs

Resolution

400.0 meters

10.1.16. GOES-East 1km

Grid Name

goes_east_1km

Description

GOES-East 1km Full Disk Grid

Projection

+proj=geos +sweep=x +lon_0=-75 +h=35786023 +ellps=GRS80 +units=m +no_defs +type=crs

Extent

[-5434894.885056, -5434894.885056, 5434894.885056, 5434894.885056]

10.1.17. GOES-East 4km

Grid Name

goes_east_4km

Description

GOES-East 4km Full Disk Grid

Projection

+proj=geos +sweep=x +lon_0=-75 +h=35786023 +ellps=GRS80 +units=m +no_defs +type=crs

Extent

[-5434894.885056, -5434894.885056, 5434894.885056, 5434894.885056]

10.1.18. GOES-East 8km

Grid Name

goes_east_8km

Description

GOES-East 8km Full Disk Grid

Projection

+proj=geos +sweep=x +lon_0=-75 +h=35786023 +ellps=GRS80 +units=m +no_defs +type=crs

Extent

[-5434894.885056, -5434894.885056, 5434894.885056, 5434894.885056]

10.1.19. GOES-East 10km

Grid Name

goes_east_10km

Description

GOES-East 10km Full Disk Grid

Projection

+proj=geos +sweep=x +lon_0=-75 +h=35786023 +ellps=GRS80 +units=m +no_defs +type=crs

Extent

[-5434894.885056, -5434894.885056, 5434894.885056, 5434894.885056]

10.1.20. GOES-West 1km

Grid Name

goes_west_1km

Description

GOES-West 1km Full Disk Grid

Projection

+proj=geos +sweep=x +lon_0=-137 +h=35786023 +ellps=GRS80 +units=m +no_defs +type=crs

Extent

[-5434894.885056, -5434894.885056, 5434894.885056, 5434894.885056]

10.1.21. GOES-West 4km

Grid Name

goes_west_4km

Description

GOES-West 4km Full Disk Grid

Projection

+proj=geos +sweep=x +lon_0=-137 +h=35786023 +ellps=GRS80 +units=m +no_defs +type=crs

Extent

[-5434894.885056, -5434894.885056, 5434894.885056, 5434894.885056]

10.1.22. GOES-West 8km

Grid Name

goes_west_8km

Description

GOES-West 8km Full Disk Grid

Projection

+proj=geos +sweep=x +lon_0=-137 +h=35786023 +ellps=GRS80 +units=m +no_defs +type=crs

Extent

[-5434894.885056, -5434894.885056, 5434894.885056, 5434894.885056]

10.1.23. GOES-West 10km

Grid Name

goes_west_10km

Description

GOES-West 10km Full Disk Grid

Projection

+proj=geos +sweep=x +lon_0=-137 +h=35786023 +ellps=GRS80 +units=m +no_defs +type=crs

Extent

[-5434894.885056, -5434894.885056, 5434894.885056, 5434894.885056]