RT_SRText | ArcGIS GeoAnalytics Engine

RT_SRText can work as a getter or a setter, depending on the inputs.

Getter: RT_SRText takes a raster column and returns the spatial reference of the column as a string in Well-Known Text (WKT) format. If the spatial reference of the input raster column has not been set, the function returns an empty string.

Setter: RT_SRText takes a raster column and a spatial reference string in Well-Known Text (WKT) format and returns the input raster column with its spatial reference set to the string value. This does not affect the raster data in the column. To transform your raster from one spatial reference to another, use RT_Transform. This also does not affect the extent of the output raster column, to set the extent of your raster column, use RT_SetExtent.

Function	Syntax
Python	`sr_text(raster_col, wkt=None)`
SQL	`RT_SRText(raster_col, wkt)`
Scala	`srText(raster, wkt)`

For more details, go to the GeoAnalytics Engine API reference for sr_text.

Examples

Python

SQL

Scala

Use dark colors for code blocksCopy

from geoanalytics.raster import functions as RT

data = [([1,2,3,4], )]
df = spark.createDataFrame(data, ["pixels"]) \
     .withColumn("raster", RT.create_raster("pixels", 2, 2, "int32"))

wkt_4326 = ('GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",'
            'SPHEROID["WGS_1984",6378137.0,298.257223563]],'
            'PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]')
df.select(RT.sr_text("raster", wkt_4326).alias("raster")) \
  .withColumn("sr_text", RT.sr_text("raster")).show(truncate=False)

Result
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+-----------------------+-------------------------------------------------------------------------------------------------------------------------------------------------+
|raster                 |sr_text                                                                                                                                          |
+-----------------------+-------------------------------------------------------------------------------------------------------------------------------------------------+
|SqlRaster(1x2x2, Int32)|GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]]|
+-----------------------+-------------------------------------------------------------------------------------------------------------------------------------------------+

Version table

Release	Notes
2.0.0	Python, SQL, and Scala functions introduced

Examples

Version table

Related topics