Raster Operations

Components to work with raster data sources

Get Values from Raster

Description

This component allows obtaining values from a raster table. The values included in the output can be determined by a vector data source input.

Inputs

• Raster table [Table]: raster data source that will be used as source for the values.

• Vector table [Table]: vector data source that will be used to determine which pixel values are going to be obtained

• Geo column: Column in the Vector table that contains a geography to determine which pixel values are going to be obtained.

• Raster properties : List of band values that are going to be obtained from the raster, in the areas where it intersects with the vector table features.

• Custom expression: (optional) Add a custom SQL expression containing an operation that uses values from the different bands in the raster, for example band_1+band_2 as sum

Advanced options

• Include pixel [boolean]: Default false. If true, the output table will include a pixel column containing the quadbin id of the corresponding pixel in the raster.

Outputs

• Result table [Table]: A table that contains a row for each pixel in the raster source that intersects with the vector source. It will contains an optional pixel column and a column for each selected property, plus any additional column generated by a custom expression.

Intersect and Aggregate Raster

Description

This component intersects a raster table with a table containing polygons and aggregates the values extracted from the intersection areas.

Inputs

• Raster table [Table]: raster data source that will be used as source for the aggregated values.

• Vector table [Table]: vector data source that contains the geographies to be enriched with aggragated data from the raster pixel values.

• Geo column: Geography column in the Vector table that will be intersected with the raster.

• Raster aggregated properties : List of aggregated band values that are going to be obtained from the raster, in the areas where it intersects with each of the vector table rows.

• Custom expression: (optional) Add a custom SQL expression containing an operation that aggregates values from the different bands in the raster, for example AVG(band_1+band_2) as avg_band_sum

Outputs

• Result table [Table]: A table that contains the same rows as the input Vector table, with an additional column for each raster aggregated property and any additional property defined as a custom expression. The values for those columns are the computed aggregation from all pixels in the raster that intersect with the vector feature.