wktstring
Description
str = wktstring(
returns the well-known
text (WKT) string representation of the specified projected or geographic coordinate
reference system. By default, crs
)wktstring
uses the WKT 2 standard and
does not apply formatting.
str = wktstring(
specifies version and formatting options using one or more crs
,Name,Value
)Name,Value
pair arguments. For example, 'Format','formatted'
includes line breaks
and indentations in the WKT string.
Examples
Get WKT of Projected CRS
Return information about projected data as a RasterInfo
object. Find the projected CRS for the data by accessing its CoordinateReferenceSystem
property.
info = georasterinfo('MtWashington-ft.grd');
p = info.CoordinateReferenceSystem;
Return the WKT as a string.
str = wktstring(p)
str = "PROJCRS["UTM Zone 19, Northern Hemisphere",BASEGEOGCRS["NAD27",DATUM["North American Datum 1927",ELLIPSOID["Clarke_1866",6378206.4,294.978698213898,LENGTHUNIT["metre",1]],ID["EPSG",6267]],PRIMEM["Greenwich",0,ANGLEUNIT["Degree",0.0174532925199433]]],CONVERSION["UTM zone 19N",METHOD["Transverse Mercator",ID["EPSG",9807]],PARAMETER["Latitude of natural origin",0,ANGLEUNIT["Degree",0.0174532925199433],ID["EPSG",8801]],PARAMETER["Longitude of natural origin",-69,ANGLEUNIT["Degree",0.0174532925199433],ID["EPSG",8802]],PARAMETER["Scale factor at natural origin",0.9996,SCALEUNIT["unity",1],ID["EPSG",8805]],PARAMETER["False easting",500000,LENGTHUNIT["Meter",1],ID["EPSG",8806]],PARAMETER["False northing",0,LENGTHUNIT["Meter",1],ID["EPSG",8807]],ID["EPSG",16019]],CS[Cartesian,2],AXIS["(E)",east,ORDER[1],LENGTHUNIT["Meter",1]],AXIS["(N)",north,ORDER[2],LENGTHUNIT["Meter",1]]]"
Get WKT of Geographic CRS
Return information about geographic data as a RasterInfo
object. Find the geographic CRS for the data by accessing its CoordinateReferenceSystem
property.
[Z,R] = readgeoraster('n39_w106_3arc_v2.dt1');
g = R.GeographicCRS;
Return the WKT as a string.
wkt = wktstring(g)
wkt = "GEOGCRS["WGS 84",DATUM["World Geodetic System 1984",ELLIPSOID["WGS 84",6378137,298.257223563,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],CS[ellipsoidal,2],AXIS["geodetic latitude (Lat)",north,ORDER[1],ANGLEUNIT["degree",0.0174532925199433]],AXIS["geodetic longitude (Lon)",east,ORDER[2],ANGLEUNIT["degree",0.0174532925199433]],ID["EPSG",4326]]"
Change Default Formatting
Return information about a data set as a RasterInfo
object. Find the projected CRS for the data by accessing the CoordinateReferenceSystem
property.
info = georasterinfo('MtWashington-ft.grd');
p = info.CoordinateReferenceSystem;
Return the WKT as a formatted string by using the 'Format'
name-value pair.
str = wktstring(p,'Format','formatted')
str = "PROJCRS["UTM Zone 19, Northern Hemisphere", BASEGEOGCRS["NAD27", DATUM["North American Datum 1927", ELLIPSOID["Clarke_1866",6378206.4,294.978698213898, LENGTHUNIT["metre",1]], ID["EPSG",6267]], PRIMEM["Greenwich",0, ANGLEUNIT["Degree",0.0174532925199433]]], CONVERSION["UTM zone 19N", METHOD["Transverse Mercator", ID["EPSG",9807]], PARAMETER["Latitude of natural origin",0, ANGLEUNIT["Degree",0.0174532925199433], ID["EPSG",8801]], PARAMETER["Longitude of natural origin",-69, ANGLEUNIT["Degree",0.0174532925199433], ID["EPSG",8802]], PARAMETER["Scale factor at natural origin",0.9996, SCALEUNIT["unity",1], ID["EPSG",8805]], PARAMETER["False easting",500000, LENGTHUNIT["Meter",1], ID["EPSG",8806]], PARAMETER["False northing",0, LENGTHUNIT["Meter",1], ID["EPSG",8807]], ID["EPSG",16019]], CS[Cartesian,2], AXIS["(E)",east, ORDER[1], LENGTHUNIT["Meter",1]], AXIS["(N)",north, ORDER[2], LENGTHUNIT["Meter",1]]]"
Export WKT as Projection File
Return information about a data set as a RasterInfo
object. Find the projected CRS for the data by accessing the CoordinateReferenceSystem
property. Return the WKT as a string using the WKT 1 standard.
info = georasterinfo('MtWashington-ft.grd'); p = info.CoordinateReferenceSystem; str = wktstring(p,'Version','wkt1');
Export the WKT as a projection file called mtwash.prj
.
writematrix(str,'mtwash.prj','FileType','text','QuoteStrings',false)
Input Arguments
Name-Value Arguments
Specify optional pairs of arguments as
Name1=Value1,...,NameN=ValueN
, where Name
is
the argument name and Value
is the corresponding value.
Name-value arguments must appear after other arguments, but the order of the
pairs does not matter.
Before R2021a, use commas to separate each name and value, and enclose
Name
in quotes.
Example: 'Version','wkt1'
specifies the WKT 1 standard for the output
well-known text string.
Format
— Format of WKT
'compact'
(default) | 'formatted'
Format of the WKT string, specified as the comma-separated pair consisting of
'Format'
and one of these values:
'compact'
– Do not include formatting.'formatted'
– Include line breaks and indentations.
Example: 'Format','formatted'
Data Types: char
| string
Version
— WKT version
'wkt2'
(default) | 'wkt1'
WKT version, specified as the comma-separated pair consisting of
'Version'
and one of these values:
'wkt2'
– Use the WKT 2 standard. For more information about this standard, see Geographic Information – Well-known text representation of coordinate reference systems.'wkt1'
– Use the WKT 1 standard. For more information about this standard, see Coordinate Transformation Service.
Example: 'Version','wkt1'
Data Types: char
| string
Tips
The WKT strings for two equivalent projcrs
or geocrs
objects may not be equivalent. Compare projcrs
or geocrs
objects by using the isequal
function
instead of by comparing WKT strings.
Version History
Introduced in R2020b
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