isea3h: ISEA Aperture 3 Hexagon (ISEA3H) Discrete Global Grid
In FRK: Fixed Rank Kriging
isea3h R Documentation
ISEA Aperture 3 Hexagon (ISEA3H) Discrete Global Grid
Description
The data used here were obtained from
https://webpages.sou.edu/~sahrk/dgg/isea.old/gen/isea3h.html and represent ISEA
discrete global grids (DGGRIDs) generated using the DGGRID software.
The original .gen files were converted to a data frame using the function dggrid_gen_to_df,
available with the dggrids package. Only resolutions 0–6 are supplied with FRK
and note that resolution 0 of ISEA3H is equal to resolution 1 in FRK. For higher
resolutions dggrids can be installed from https://github.com/andrewzm/dggrids/
using devtools.
Usage
isea3h
Format
A data frame with 284,208 rows and 5 variables:
- id
grid identification number within the given resolution
- lon
longitude coordinate
- lat
latitude coordinate
- res
DGGRID resolution (0 – 6)
- centroid
A 0-1 variable, indicating whether the point describes the centroid of the polygon,
or whether it is a boundary point of the polygon
References
Sahr, K. (2008). Location coding on icosahedral aperture 3 hexagon discrete global grids. Computers, Environment and Urban Systems, 32, 174–187.
FRK documentation built on Sept. 11, 2024, 7:14 p.m.
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| isea3h | R Documentation |
ISEA Aperture 3 Hexagon (ISEA3H) Discrete Global Grid
Description
The data used here were obtained from
https://webpages.sou.edu/~sahrk/dgg/isea.old/gen/isea3h.html and represent ISEA
discrete global grids (DGGRIDs) generated using the DGGRID software.
The original .gen files were converted to a data frame using the function dggrid_gen_to_df,
available with the dggrids package. Only resolutions 0–6 are supplied with FRK
and note that resolution 0 of ISEA3H is equal to resolution 1 in FRK. For higher
resolutions dggrids can be installed from https://github.com/andrewzm/dggrids/
using devtools.
Usage
isea3h
Format
A data frame with 284,208 rows and 5 variables:
- id
grid identification number within the given resolution
- lon
longitude coordinate
- lat
latitude coordinate
- res
DGGRID resolution (0 – 6)
- centroid
A 0-1 variable, indicating whether the point describes the centroid of the polygon, or whether it is a boundary point of the polygon
References
Sahr, K. (2008). Location coding on icosahedral aperture 3 hexagon discrete global grids. Computers, Environment and Urban Systems, 32, 174–187.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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