Tool NameCHELSA - Global Climate Data
Tool ID15
Library IDio_webservices
Version1.0
Author(s)O.Conrad (c) 2025

Description

Download, project and optionally resample climate data provided by CHELSA (Climatologies at High resolution for the Earth's Land Surface Areas) for the area of your interest.

Provided Variables

Daily
KeyNameUnitDescription
cltTotal Cloud Cover Percentage%Total cloud area fraction (reported as a percentage) for the whole atmospheric column as seen from the surface or the top of the atmosphere. Includes both large-scale and convective cloud.
hursNear-Surface Relative Humidity%The relative humidity with respect to liquid water for T> 0 C and with respect to ice for T
prPrecipitationkg/m²includes both liquid and solid phases
psSurface Air PressurehPasurface pressure (not mean sea-level pressure)
rsdsSurface Downwelling Shortwave Flux in AirkWh/m²/dayDaily surface solar irradiation.
sfcWindNear-Surface Wind Speedm/snear-surface (usually 10 meters) wind speed.
tasDaily Mean Near-Surface Air Temperature°Cnear-surface (usually 2 meter) air temperature
tasmaxDaily Maximum Near-Surface Air Temperature°Cmaximum near-surface (usually 2 meter) air temperature
tasminDaily Minimum Near-Surface Air Temperature°Cminimum near-surface (usually 2 meter) air temperature
tzAir Temperature Lapse Rate°C/100mRate of change in air temperature with altitude
Monthly
KeyNameUnitDescription
cltTotal Cloud Cover Percentage%Total cloud area fraction (reported as a percentage) for the whole atmospheric column as seen from the surface or the top of the atmosphere. Includes both large-scale and convective cloud.
cmiMonthly Climate Moisture Indexkg/m²Monthly ratio of precipitation to potential evapotranspiration; indicator of climatic water availability
hursNear-Surface Relative Humidity%The relative humidity with respect to liquid water for T> 0 C and with respect to ice for T
petMonthly Potential Evapotranspirationkg/m²Total potential evapotranspiration for the month assuming unlimited water availability calculated based on Penman Monteith
prPrecipitationkg/m²includes both liquid and solid phases
rsdsSurface Downwelling Shortwave Flux in AirkWh/m²/dayDaily surface solar irradiation.
sfcWindNear-Surface Wind Speedm/snear-surface (usually 10 meters) wind speed.
spei12Standardized Precipitation Evapotranspiration IndexStandardized index of climatic water balance (precipitation minus potential evapotranspiration) over a given integration period here 12 months expressed in standard deviations from the long term mean, used to characterize drought severity and duration
spi12Standardized Precipitation IndexStandardized index of precipitation anomalies over a given integration period here 12 months expressed in standard deviations from the long-term mean; used to characterize drought severity and duration without accounting for evapotranspiration
tasDaily Mean Near-Surface Air Temperature°Cnear-surface (usually 2 meter) air temperature
tasmaxDaily Maximum Near-Surface Air Temperature°Cmaximum near-surface (usually 2 meter) air temperature
tasminDaily Minimum Near-Surface Air Temperature°Cminimum near-surface (usually 2 meter) air temperature
vpdVapor Pressure DeficitPaDifference between the saturation vapor pressure and actual vapor pressure representing atmospheric drying power
Climatology
KeyNameUnitDescription
cltTotal Cloud Cover Percentage%Total cloud area fraction (reported as a percentage) for the whole atmospheric column as seen from the surface or the top of the atmosphere. Includes both large-scale and convective cloud.
cmiMonthly Climate Moisture Indexkg/m²Monthly ratio of precipitation to potential evapotranspiration; indicator of climatic water availability
hursNear-Surface Relative Humidity%The relative humidity with respect to liquid water for T> 0 C and with respect to ice for T
petMonthly Potential Evapotranspirationkg/m²Total potential evapotranspiration for the month assuming unlimited water availability calculated based on Penman Monteith
prPrecipitationkg/m²includes both liquid and solid phases
rsdsSurface Downwelling Shortwave Flux in AirkWh/m²/dayDaily surface solar irradiation.
sfcWindNear-Surface Wind Speedm/snear-surface (usually 10 meters) wind speed.
tasDaily Mean Near-Surface Air Temperature°Cnear-surface (usually 2 meter) air temperature
tasmaxDaily Maximum Near-Surface Air Temperature°Cmaximum near-surface (usually 2 meter) air temperature
tasminDaily Minimum Near-Surface Air Temperature°Cminimum near-surface (usually 2 meter) air temperature
vpdVapor Pressure DeficitPaDifference between the saturation vapor pressure and actual vapor pressure representing atmospheric drying power
Bioclimatological Indicators
KeyNameUnitDescription
bio01Mean Annual Near-Surface Air Temperature°CMean annual temperature calculated as the average of mean monthly temperatures over the year
bio02Mean Diurnal Near-Surface Air Temperature Range°CMean diurnal temperature range computed as the average of monthly (tasmax − tasmin)
bio03Isothermality%Isothermality: 100 × (bio02 ÷ bio07); compares day–night variability to annual temperature range
bio04Temperature Seasonality°CTemperature seasonality given by the standard deviation of mean monthly temperatures
bio05Mean Daily Maximum Near-Surface Air Temperature of the Warmest Month°CHighest monthly mean of daily maximum temperatures (tasmax) across the year; indicates peak thermal conditions
bio06Mean Daily Minimum Near-Surface Air Temperature of the Coldest Month°CLowest monthly mean of daily minimum temperatures (tasmin) across the year; characterizes winter cold intensity
bio07Annual Daily Mean Near-Surface Air Temperature Range°CAnnual temperature range calculated as bio05 − bio06; measures amplitude between warmest and coldest months
bio08Mean Daily Near-Surface Air Temperature of the Wettest Quarter°CAverage monthly mean temperature over the wettest 3-month period of the year
bio09Mean Daily Near-Surface Air Temperature of the Driest Quarter°CAverage monthly mean temperature over the driest 3-month period of the year
bio10Mean Daily Mean Near-Surface Air Temperature of the Warmest Quarter°CAverage monthly mean temperature over the warmest 3-month period of the year
bio11Mean Daily Mean Near-Surface Air Temperature of the Coldest Quarter°CAverage monthly mean temperature over the coldest 3-month period of the year
bio12Annual Precipitationkg/m²Sum of monthly precipitation totals across the year
bio13Precipitation of the Wettest Monthkg/m²Maximum monthly precipitation total
bio14Precipitation of the Driest Monthkg/m²Minimum monthly precipitation total
bio15Precipitation Seasonality%Coefficient of variation (100 × SD ÷ mean) of monthly precipitation totals
bio16Mean Monthly Precipitation of the Wettest Quarterkg/m²Average monthly precipitation during the wettest 3-month period of the year
bio17Mean Monthly Precipitation of the Driest Quarterkg/m²Average monthly precipitation during the driest 3-month period of the year
bio18Mean Monthly Precipitation of the Warmest Quarterkg/m²Average monthly precipitation during the warmest 3-month period of the year
bio19Mean Monthly Precipitation of the Coldest Quarterkg/m²Average monthly precipitation during the coldest 3-month period of the year
fcfFrost Change FrequencydaysNumber of freeze–thaw transitions per year
fgdFirst Day of the Growing Season (TREELIM)day of yearDay of the year number marking the first occurrence of growing season conditions
gdd0Growing Degree Days Heat Sum above 0 °C°CSum of daily mean temperatures above 0 °C accumulated over the year
gdd10Growing Degree Days Heat Sum above 10 °C°CSum of daily mean temperatures above 10 °C accumulated over the year
gdd5Growing Degree Days Heat Sum above 5 °C°CSum of daily mean temperatures above 5 °C accumulated over the year
gdgfgd10First Growing Degree Day above 10 °Cday of yearDay of the year number of the first occurrence of a daily mean temperature above 10 °C
gdgfgd5First Growing Degree Day above 5 °Cday of yearDay of the year number of the first occurrence of a daily mean temperature above 5 °C
gslGrowing Season LengthdaysNumber of days between the first and last occurrence of growing season conditions
gspAccumulated Precipiation Amount over Growing Season Dayskg/m²Total precipitation accumulated during the growing season period
gstMean Temperature of Growing Season Days°CAverage daily mean temperature over all growing season days
kg0Köppen-Geiger Climate ClassificationcategoryKöppen–Geiger climate classification
kg1Köppen-Geiger Climate Classification (without As/Aw)categoryKöppen–Geiger climate classification without As/Aw differenciation
kg2Köppen-Geiger Climate Classification (Peel et al. 2007)categoryKöppen–Geiger climate classification after href="https://doi.org/10.5194/hess-11-1633-2007">Peel et al. 2007
kg3Wissmann Climate ClassificationcategoryClimate classification after Wissmann 1939
kg4Thornthwaite Climate ClassificationcategoryClimate classification after Thornthwaite 1931
kg5Troll-Paffen Climate ClassificationcategoryClimate classification after Troll-Paffen
lgdLast Day of the Growing Season (TREELIM)day of yearDay of the year number of the last occurrence of growing season conditions
ngd0Number of Growing Degree Days above 0 °Cnumber of daysTotal number of days in a year with mean daily temperature above 0 °C
ngd10Number of Growing Degree Days above 10 °Cnumber of daysTotal number of days in a year with mean daily temperature above 10 °C
ngd5Number of Growing Degree Days above 5 °Cnumber of daysTotal number of days in a year with mean daily temperature above 5 °C
nppNet Primary Production on Land as Carbon Mass FluxgC/m²/yrProduction of carbon' means the production of biomass expressed as the mass of carbon which it contains. Net primary production is the excess of gross primary production (rate of synthesis of biomass from inorganic precursors) by autotrophs ('producers') for example photosynthesis in plants or phytoplankton over the rate at which the autotrophs themselves respire some of this biomass. 'Productivity' means production per unit area. The phrase 'expressed_as' is used in the construction A_expressed_as_B where B is a chemical constituent of A. It means that the quantity indicated by the standard name is calculated solely with respect to the B contained in A neglecting all other chemical constituents of A.
scdSnow Cover DaysdaysNumber of days per year with snow cover present at the surface
sweSnow Water Equivalentkg/m²/yrTotal water equivalent of snowpack accumulated over the year
TraCE21k-centennial
KeyNameUnitDescription
prPrecipitationkg/m²includes both liquid and solid phases
tasmaxDaily Maximum Near-Surface Air Temperature°Cmaximum near-surface (usually 2 meter) air temperature
tasminDaily Minimum Near-Surface Air Temperature°Cminimum near-surface (usually 2 meter) air temperature
tzAir Temperature Lapse Rate°C/100mRate of change in air temperature with altitude
TraCE21k-centennial-bioclim
KeyNameUnitDescription
bio01Mean Annual Near-Surface Air Temperature°CMean annual temperature calculated as the average of mean monthly temperatures over the year
bio02Mean Diurnal Near-Surface Air Temperature Range°CMean diurnal temperature range computed as the average of monthly (tasmax − tasmin)
bio03Isothermality%Isothermality: 100 × (bio02 ÷ bio07); compares day–night variability to annual temperature range
bio04Temperature Seasonality°CTemperature seasonality given by the standard deviation of mean monthly temperatures
bio05Mean Daily Maximum Near-Surface Air Temperature of the Warmest Month°CHighest monthly mean of daily maximum temperatures (tasmax) across the year; indicates peak thermal conditions
bio06Mean Daily Minimum Near-Surface Air Temperature of the Coldest Month°CLowest monthly mean of daily minimum temperatures (tasmin) across the year; characterizes winter cold intensity
bio07Annual Daily Mean Near-Surface Air Temperature Range°CAnnual temperature range calculated as bio05 − bio06; measures amplitude between warmest and coldest months
bio08Mean Daily Near-Surface Air Temperature of the Wettest Quarter°CAverage monthly mean temperature over the wettest 3-month period of the year
bio09Mean Daily Near-Surface Air Temperature of the Driest Quarter°CAverage monthly mean temperature over the driest 3-month period of the year
bio10Mean Daily Mean Near-Surface Air Temperature of the Warmest Quarter°CAverage monthly mean temperature over the warmest 3-month period of the year
bio11Mean Daily Mean Near-Surface Air Temperature of the Coldest Quarter°CAverage monthly mean temperature over the coldest 3-month period of the year
bio12Annual Precipitationkg/m²Sum of monthly precipitation totals across the year
bio13Precipitation of the Wettest Monthkg/m²Maximum monthly precipitation total
bio14Precipitation of the Driest Monthkg/m²Minimum monthly precipitation total
bio15Precipitation Seasonality%Coefficient of variation (100 × SD ÷ mean) of monthly precipitation totals
bio16Mean Monthly Precipitation of the Wettest Quarterkg/m²Average monthly precipitation during the wettest 3-month period of the year
bio17Mean Monthly Precipitation of the Driest Quarterkg/m²Average monthly precipitation during the driest 3-month period of the year
bio18Mean Monthly Precipitation of the Warmest Quarterkg/m²Average monthly precipitation during the warmest 3-month period of the year
bio19Mean Monthly Precipitation of the Coldest Quarterkg/m²Average monthly precipitation during the coldest 3-month period of the year
glzIce Sheet Surface AltitudemElevation of the ice sheet surface above sea level
orogSurface AltitudemThe surface called 'surface' means the lower boundary of the atmosphere. Altitude is the (geometric) height above the geoid which is the reference geopotential surface. The geoid is similar to mean sea level.
scdSnow Cover DaysdaysNumber of days per year with snow cover present at the surface

References

Karger, D. N., Conrad, O., Böhner, J., Kawohl, T., Kreft, H., Soria-Auza, R. W., Zimmermann, N. E., Linder, H. P., Kessler, M. (2021): Climatologies at high resolution for the earth's land surface areas. EnviDat. doi:10.16904/envidat.228

CHELSA Website


Parameters

NameTypeIdentifierDescriptionConstraints
Input
Gridgrid, inputGRID
Shapesshapes, inputSHAPES
Output
Gridsgrid list, outputGRIDS
Options
OutputchoiceOUTPUTAvailable Choices:
[0] files
[1] memory
Default: 1
TypechoiceMEMTYPEAvailable Choices:
[0] single grids
[1] grid collection
Default: 1
Folderfile pathFOLDER
FormatchoiceFORMATAvailable Choices:
[0] GeoTIFF (*.tif)
[1] SAGA Compressed Grid File (*.sg-grd-z)
Default: 1
Data SetchoiceDATASETAvailable Choices:
[0] daily
[1] monthly
[2] climatology
[3] bioclim
[4] TraCE21k-cenntenial
[5] TraCE21k-cenntenial-bioclim
Default: 2
From DaydateDAILY_FROMDefault: 1979-01-01
To DaydateDAILY_TODefault: 2024-12-31
From Yearinteger numberYEAR_FROMMinimum: 1979
Maximum: 2021
Default: 1979
To Yearinteger numberYEAR_TOMinimum: 1979
Maximum: 2021
Default: 2021
PeriodchoicePERIODAvailable Choices:
[0] 1981-2010
[1] 2011-2040
[2] 2041-2070
[3] 2071-2100
Default: 0
ModelchoiceMODELAvailable Choices:
[0] GFDL-ESM4
[1] IPSL-CM6A-LR
[2] MPI-ESM1-2-HR
[3] MRI-ESM2-0
[4] UKESM1-0-LL
Default: 2
ScenariochoiceSCENARIOAvailable Choices:
[0] SSP1-2.6
[1] SSP3-7.0
[2] SSP5-8.5
Default: 2
Centuryinteger numberCENTURYMinimum: -200
Maximum: 20
Default: -200
From Centuryinteger numberCENTURY_FROMMinimum: -200
Maximum: 20
Default: -200
To Centuryinteger numberCENTURY_TOMinimum: -200
Maximum: 20
Default: 20
Stepinteger numberCENTURY_STEPMinimum: 1
Maximum: 55
Default: 1
VariablechoiceVAR_DAILYAvailable Choices:
[0] Total Cloud Cover Percentage
[1] Near-Surface Relative Humidity
[2] Precipitation
[3] Surface Air Pressure
[4] Surface Downwelling Shortwave Flux in Air
[5] Near-Surface Wind Speed
[6] Daily Mean Near-Surface Air Temperature
[7] Daily Maximum Near-Surface Air Temperature
[8] Daily Minimum Near-Surface Air Temperature
[9] Air Temperature Lapse Rate
Default: 0
VariablechoiceVAR_MONTHLYAvailable Choices:
[0] Total Cloud Cover Percentage
[1] Monthly Climate Moisture Index
[2] Near-Surface Relative Humidity
[3] Monthly Potential Evapotranspiration
[4] Precipitation
[5] Surface Downwelling Shortwave Flux in Air
[6] Near-Surface Wind Speed
[7] Standardized Precipitation Evapotranspiration Index
[8] Standardized Precipitation Index
[9] Daily Mean Near-Surface Air Temperature
[10] Daily Maximum Near-Surface Air Temperature
[11] Daily Minimum Near-Surface Air Temperature
[12] Vapor Pressure Deficit
Default: 0
VariablechoiceVAR_CLIMATEAvailable Choices:
[0] Total Cloud Cover Percentage
[1] Monthly Climate Moisture Index
[2] Near-Surface Relative Humidity
[3] Monthly Potential Evapotranspiration
[4] Precipitation
[5] Surface Downwelling Shortwave Flux in Air
[6] Near-Surface Wind Speed
[7] Daily Mean Near-Surface Air Temperature
[8] Daily Maximum Near-Surface Air Temperature
[9] Daily Minimum Near-Surface Air Temperature
[10] Vapor Pressure Deficit
Default: 0
VariablechoiceVAR_CLIMATE_FUTUREAvailable Choices:
[0] Precipitation
[1] Daily Mean Near-Surface Air Temperature
[2] Daily Maximum Near-Surface Air Temperature
[3] Daily Minimum Near-Surface Air Temperature
Default: 0
VariablechoiceVAR_BIOCLIMAvailable Choices:
[0] Mean Annual Near-Surface Air Temperature
[1] Mean Diurnal Near-Surface Air Temperature Range
[2] Isothermality
[3] Temperature Seasonality
[4] Mean Daily Maximum Near-Surface Air Temperature of the Warmest Month
[5] Mean Daily Minimum Near-Surface Air Temperature of the Coldest Month
[6] Annual Daily Mean Near-Surface Air Temperature Range
[7] Mean Daily Near-Surface Air Temperature of the Wettest Quarter
[8] Mean Daily Near-Surface Air Temperature of the Driest Quarter
[9] Mean Daily Mean Near-Surface Air Temperature of the Warmest Quarter
[10] Mean Daily Mean Near-Surface Air Temperature of the Coldest Quarter
[11] Annual Precipitation
[12] Precipitation of the Wettest Month
[13] Precipitation of the Driest Month
[14] Precipitation Seasonality
[15] Mean Monthly Precipitation of the Wettest Quarter
[16] Mean Monthly Precipitation of the Driest Quarter
[17] Mean Monthly Precipitation of the Warmest Quarter
[18] Mean Monthly Precipitation of the Coldest Quarter
[19] Frost Change Frequency
[20] First Day of the Growing Season (TREELIM)
[21] Growing Degree Days Heat Sum above 0 °C
[22] Growing Degree Days Heat Sum above 10 °C
[23] Growing Degree Days Heat Sum above 5 °C
[24] First Growing Degree Day above 10 °C
[25] First Growing Degree Day above 5 °C
[26] Growing Season Length
[27] Accumulated Precipiation Amount over Growing Season Days
[28] Mean Temperature of Growing Season Days
[29] Köppen-Geiger Climate Classification
[30] Köppen-Geiger Climate Classification (without As/Aw)
[31] Köppen-Geiger Climate Classification (Peel et al. 2007)
[32] Wissmann Climate Classification
[33] Thornthwaite Climate Classification
[34] Troll-Paffen Climate Classification
[35] Last Day of the Growing Season (TREELIM)
[36] Number of Growing Degree Days above 0 °C
[37] Number of Growing Degree Days above 10 °C
[38] Number of Growing Degree Days above 5 °C
[39] Net Primary Production on Land as Carbon Mass Flux
[40] Snow Cover Days
[41] Snow Water Equivalent
[42] [all]
Default: 0
VariablechoiceVAR_BIOCLIM_FUTUREAvailable Choices:
[0] Mean Annual Near-Surface Air Temperature
[1] Mean Diurnal Near-Surface Air Temperature Range
[2] Isothermality
[3] Temperature Seasonality
[4] Mean Daily Maximum Near-Surface Air Temperature of the Warmest Month
[5] Mean Daily Minimum Near-Surface Air Temperature of the Coldest Month
[6] Annual Daily Mean Near-Surface Air Temperature Range
[7] Mean Daily Near-Surface Air Temperature of the Wettest Quarter
[8] Mean Daily Near-Surface Air Temperature of the Driest Quarter
[9] Mean Daily Mean Near-Surface Air Temperature of the Warmest Quarter
[10] Mean Daily Mean Near-Surface Air Temperature of the Coldest Quarter
[11] Annual Precipitation
[12] Precipitation of the Wettest Month
[13] Precipitation of the Driest Month
[14] Precipitation Seasonality
[15] Mean Monthly Precipitation of the Wettest Quarter
[16] Mean Monthly Precipitation of the Driest Quarter
[17] Mean Monthly Precipitation of the Warmest Quarter
[18] Mean Monthly Precipitation of the Coldest Quarter
[19] Frost Change Frequency
[20] First Day of the Growing Season (TREELIM)
[21] Growing Degree Days Heat Sum above 0 °C
[22] Growing Degree Days Heat Sum above 10 °C
[23] Growing Degree Days Heat Sum above 5 °C
[24] First Growing Degree Day above 10 °C
[25] First Growing Degree Day above 5 °C
[26] Growing Season Length
[27] Accumulated Precipiation Amount over Growing Season Days
[28] Mean Temperature of Growing Season Days
[29] Köppen-Geiger Climate Classification
[30] Köppen-Geiger Climate Classification (without As/Aw)
[31] Köppen-Geiger Climate Classification (Peel et al. 2007)
[32] Wissmann Climate Classification
[33] Thornthwaite Climate Classification
[34] Troll-Paffen Climate Classification
[35] Last Day of the Growing Season (TREELIM)
[36] Number of Growing Degree Days above 0 °C
[37] Number of Growing Degree Days above 10 °C
[38] Number of Growing Degree Days above 5 °C
[39] Net Primary Production on Land as Carbon Mass Flux
[40] Snow Cover Days
[41] Snow Water Equivalent
[42] [all]
Default: 0
VariablechoiceVAR_T21KAvailable Choices:
[0] Precipitation
[1] Daily Maximum Near-Surface Air Temperature
[2] Daily Minimum Near-Surface Air Temperature
[3] Air Temperature Lapse Rate
Default: 0
VariablechoiceVAR_T21K_BIOCLIMAvailable Choices:
[0] Mean Annual Near-Surface Air Temperature
[1] Mean Diurnal Near-Surface Air Temperature Range
[2] Isothermality
[3] Temperature Seasonality
[4] Mean Daily Maximum Near-Surface Air Temperature of the Warmest Month
[5] Mean Daily Minimum Near-Surface Air Temperature of the Coldest Month
[6] Annual Daily Mean Near-Surface Air Temperature Range
[7] Mean Daily Near-Surface Air Temperature of the Wettest Quarter
[8] Mean Daily Near-Surface Air Temperature of the Driest Quarter
[9] Mean Daily Mean Near-Surface Air Temperature of the Warmest Quarter
[10] Mean Daily Mean Near-Surface Air Temperature of the Coldest Quarter
[11] Annual Precipitation
[12] Precipitation of the Wettest Month
[13] Precipitation of the Driest Month
[14] Precipitation Seasonality
[15] Mean Monthly Precipitation of the Wettest Quarter
[16] Mean Monthly Precipitation of the Driest Quarter
[17] Mean Monthly Precipitation of the Warmest Quarter
[18] Mean Monthly Precipitation of the Coldest Quarter
[19] Ice Sheet Surface Altitude
[20] Surface Altitude
[21] Snow Cover Days
Default: 0
ExtentchoiceEXTENTAvailable Choices:
[0] user defined
[1] shapes extent
[2] grid system extent
[3] grid system
Default: 0
Westfloating point numberXMINDefault: 260000.000000
Eastfloating point numberXMAXDefault: 941000.000000
Southfloating point numberYMINDefault: 5215000.000000
Northfloating point numberYMAXDefault: 6121000.000000
Columnsinteger numberNXMinimum: 1
Default: 682
Rowsinteger numberNYMinimum: 1
Default: 907
Bufferfloating point numberBUFFERadd buffer (map units) to extentMinimum: 0.000000
Default: 0.000000
Take CellsizechoiceCELLSIZEDEFAvailable Choices:
[0] data type resolution
[1] user defined
Default: 0
Cellsizefloating point numberCELLSIZEMinimum: 0.000100
Default: 1000.000000
Coordinate System DefinitiontextCRS_STRINGSupported formats comprise PROJ and WKT strings, object codes (e.g. "EPSG:4326").