geoAlbers
geoAlbers: "geoAlbers"
geoConicEqualArea
geoConicEqualArea: "geoConicEqualArea"
geoConicEquidistant
geoConicEquidistant: "geoConicEquidistant"
geoEqualEarth
geoEqualEarth: "geoEqualEarth"
geoEquirectangular
geoEquirectangular: "geoEquirectangular"
geoMercator
geoMercator: "geoMercator"
geoNaturalEarth1
geoNaturalEarth1: "geoNaturalEarth1"
enum of supported projection types