graticules

grat = graticules(D, width=(30,20), grid=nothing, annot_x=nothing)

or

grat = graticules(; proj="projection", width=(30,20), pm=0, grid=nothing, annot_x=nothing)

Create a projected graticule GMTdataset with meridians and parallels at width intervals.

• D: A GMTdataset (or vector of them) holding the projection info. Instead of GMTdataset type, this argument may also be a referenced grid or image type.

• proj: Alternatively pass a proj4 string or Symbol describing the projection

• pm: The projection prime meridian (Default is 0 or whatever is in D.proj4).

• width: A scalar or two elements array/tuple with increments in longitude and latitude. If scalar, width_x = width_y.

• grid: Instead of using the width argument, that generates an automatic set of graticules, one may pass a two elements Vector{Vector{Real}} with the meridians (grid[1]) and parallels (grid[2]) to create.

• annot_x: By default, all meridians are annotated when grat is used in the [plotgrid!] function, but depending on the projection and the latlim argument used in worldrectangular we may have the longitude labels overlap close to the prime meridian. To minimize that pass a vector of longitudes to be annotated. e.g. annot_x=[-180,-150,0,150,180] will annotate only those longitudes.

Returns

A Vector of GMTdataset containing the projected meridians and parallels. grat[i] attributes store information about that element lon,lat.

Example

using GMT
grat = graticules(proj="+proj=ob_tran +o_proj=moll +o_lon_p=40 +o_lat_p=50 +lon_0=60");

See Also

coastlinesproj, [plotgrid!], worldrectangular, worldrectgrid, worldrectcoast, [Best rectangular world map projection]