{"_id":"5a3ae7a0f6c92b0028097bd3","project":"55faeacad0e22017005b8265","version":{"_id":"55faeacad0e22017005b8268","project":"55faeacad0e22017005b8265","__v":35,"createdAt":"2015-09-17T16:31:06.800Z","releaseDate":"2015-09-17T16:31:06.800Z","categories":["55faeacbd0e22017005b8269","55faf550764f50210095078e","55faf5b5626c341700fd9e96","55faf8a7825d5f19001fa386","560052f91503430d007cc88f","560054f73aa0520d00da0b1a","56005aaf6932a00d00ba7c62","56005c273aa0520d00da0b3f","5601ae7681a9670d006d164d","5601ae926811d00d00ceb487","5601aeb064866b1900f4768d","5601aee850ee460d0002224c","5601afa02499c119000faf19","5601afd381a9670d006d1652","561d4c78281aec0d00eb27b6","561d588d8ca8b90d00210219","563a5f934cc3621900ac278c","5665c5763889610d0008a29e","566710a36819320d000c2e93","56ddf6df8a5ae10e008e3926","56e1c96b2506700e00de6e83","56e1ccc4e416450e00b9e48c","56e1ccdfe63f910e00e59870","56e1cd10bc46be0e002af26a","56e1cd21e416450e00b9e48e","56e3139a51857d0e008e77be","573b4f62ef164e2900a2b881","57c9d1335fd8ca0e006308ed","57e2bd9d1e7b7220000d7fa5","57f2b992ac30911900c7c2b6","58adb5c275df0f1b001ed59b","58c81b5c6dc7140f003c3c46","595412446ed4d9001b3e7b37","59e76ce41938310028037295","5a009de510890d001c2aabfe"],"is_deprecated":false,"is_hidden":false,"is_beta":false,"is_stable":true,"codename":"v1","version_clean":"1.0.0","version":"1"},"category":{"_id":"573b4f62ef164e2900a2b881","__v":0,"project":"55faeacad0e22017005b8265","version":"55faeacad0e22017005b8268","sync":{"url":"","isSync":false},"reference":false,"createdAt":"2016-05-17T17:05:38.443Z","from_sync":false,"order":8,"slug":"algorithm-guide","title":"Algorithms"},"user":"55fae9d4825d5f19001fa379","__v":0,"parentDoc":null,"updates":[],"next":{"pages":[],"description":""},"createdAt":"2017-12-20T22:43:44.430Z","link_external":false,"link_url":"","githubsync":"","sync_unique":"","hidden":false,"api":{"results":{"codes":[]},"settings":"","auth":"required","params":[],"url":""},"isReference":false,"order":119,"body":"### Inputs\nThe following table lists all ENVI_RootStretchRaster inputs.\nMandatory (optional) settings are listed as Required = True (Required = False).\n\n  Name  |  Required  |  Default  |  Valid Values  |  Description  \n--------|:----------:|-----------|----------------|---------------\nfile_types|False|N/A|string|GBDX Option. Comma seperated list of permitted file type extensions. Use this to filter input files -- Value Type: STRING`[*]`\ninput_raster|True|N/A|[See ENVIRASTER input type](https://gbdxdocs.digitalglobe.com/docs/envi-task-engine#section-enviraster)|Specify a raster on which to apply root stretch. -- Value Type: ENVIRASTER\ninput_raster_format|False|N/A|[See ENVIRASTER input type](https://gbdxdocs.digitalglobe.com/docs/envi-task-engine#section-enviraster)|Provide the format of the image, for example: landsat-8. -- Value Type: STRING\ninput_raster_band_grouping|False|N/A|[See ENVIRASTER input type](https://gbdxdocs.digitalglobe.com/docs/envi-task-engine#section-enviraster)|Provide the name of the band grouping to be used in the task, ie - panchromatic. -- Value Type: STRING\ninput_raster_filename|False|N/A|[See ENVIRASTER input type](https://gbdxdocs.digitalglobe.com/docs/envi-task-engine#section-enviraster)|Provide the explicit relative raster filename that ENVI will open. This overrides any file lookup in the task runner. -- Value Type: STRING\nbrightness|False|N/A|string|Specify an integer value from 0 to 100, indicating the brightness level to display. If the array has one value, it applies to all bands, otherwise it must have the same number of elements as the input raster has bands. -- Value Type: DOUBLEARRAY\nmax|True|N/A|string|Specify the maximum value to be considered, also known as the white point. If the array has one value, it applies to all bands, otherwise it must have the same number of elements as the input raster has bands. -- Value Type: DOUBLEARRAY\nmin|True|N/A|string|Specify the minimum value to be considered, also known as the black point. If the array has one value, it applies to all bands, otherwise it must have the same number of elements as the input raster has bands. -- Value Type: DOUBLEARRAY\nroot_index|False| `[2.0]`|string|Specify the degree of the root, or an array of degree values. For example, the default value of 2 indicates a square root. If the array has one value, it applies to all bands, otherwise it must have the same number of elements as the input raster has bands. -- Value Type: DOUBLEARRAY -- Default Value: `[2.0]`\noutput_raster_uri_filename|False|N/A|string|Specify a string with the fully-qualified path and filename for OUTPUT_RASTER. -- Value Type: STRING\n\n\n### Outputs\n\nThe following table lists all ENVI_RootStretchRaster outputs.\nMandatory (optional) settings are listed as Required = True (Required = False).\n\n  Name  |  Required  |  Default  |  Valid Values  |  Description\n--------|:----------:|-----------|----------------|---------------\ntask_meta_data|False|N/A|directory|GBDX Option. Output location for task meta data such as execution log and output JSON\noutput_raster_uri|True|N/A|directory|Output for OUTPUT_RASTER. -- Value Type: ENVIURI\n\n\n**Output structure**\n\nThe output_raster_uri file will be written to the specified S3 Customer Account Location.\n\n### Background\nFor additional background information on this task please refer to the [Harris Geospatial ENVI documentation](http://www.harrisgeospatial.com/docs/home.html) and \n[ENVI® Root Stretch Raster](http://www.harrisgeospatial.com/docs/envirootstretchrastertask.html). \n\n### Contact\nIf you have any questions or issues with this task, please contact [gbdx-support:::at:::digitalglobe.com](gbdx-support@digitalglobe.com).","excerpt":"This task accepts a source raster and returns a raster with a root stretch applied. With this type of stretch, ENVI calculates the square root of the input histogram and applies a linear stretch.\n    \n**GBDX Registered Name:** ENVI_RootStretchRaster\n**Provider:** Harris Geospatial Solutions","slug":"envi-root-stretch-raster","type":"basic","title":"ENVI® Root Stretch Raster"}

ENVI® Root Stretch Raster

This task accepts a source raster and returns a raster with a root stretch applied. With this type of stretch, ENVI calculates the square root of the input histogram and applies a linear stretch. **GBDX Registered Name:** ENVI_RootStretchRaster **Provider:** Harris Geospatial Solutions

### Inputs The following table lists all ENVI_RootStretchRaster inputs. Mandatory (optional) settings are listed as Required = True (Required = False). Name | Required | Default | Valid Values | Description --------|:----------:|-----------|----------------|--------------- file_types|False|N/A|string|GBDX Option. Comma seperated list of permitted file type extensions. Use this to filter input files -- Value Type: STRING`[*]` input_raster|True|N/A|[See ENVIRASTER input type](https://gbdxdocs.digitalglobe.com/docs/envi-task-engine#section-enviraster)|Specify a raster on which to apply root stretch. -- Value Type: ENVIRASTER input_raster_format|False|N/A|[See ENVIRASTER input type](https://gbdxdocs.digitalglobe.com/docs/envi-task-engine#section-enviraster)|Provide the format of the image, for example: landsat-8. -- Value Type: STRING input_raster_band_grouping|False|N/A|[See ENVIRASTER input type](https://gbdxdocs.digitalglobe.com/docs/envi-task-engine#section-enviraster)|Provide the name of the band grouping to be used in the task, ie - panchromatic. -- Value Type: STRING input_raster_filename|False|N/A|[See ENVIRASTER input type](https://gbdxdocs.digitalglobe.com/docs/envi-task-engine#section-enviraster)|Provide the explicit relative raster filename that ENVI will open. This overrides any file lookup in the task runner. -- Value Type: STRING brightness|False|N/A|string|Specify an integer value from 0 to 100, indicating the brightness level to display. If the array has one value, it applies to all bands, otherwise it must have the same number of elements as the input raster has bands. -- Value Type: DOUBLEARRAY max|True|N/A|string|Specify the maximum value to be considered, also known as the white point. If the array has one value, it applies to all bands, otherwise it must have the same number of elements as the input raster has bands. -- Value Type: DOUBLEARRAY min|True|N/A|string|Specify the minimum value to be considered, also known as the black point. If the array has one value, it applies to all bands, otherwise it must have the same number of elements as the input raster has bands. -- Value Type: DOUBLEARRAY root_index|False| `[2.0]`|string|Specify the degree of the root, or an array of degree values. For example, the default value of 2 indicates a square root. If the array has one value, it applies to all bands, otherwise it must have the same number of elements as the input raster has bands. -- Value Type: DOUBLEARRAY -- Default Value: `[2.0]` output_raster_uri_filename|False|N/A|string|Specify a string with the fully-qualified path and filename for OUTPUT_RASTER. -- Value Type: STRING ### Outputs The following table lists all ENVI_RootStretchRaster outputs. Mandatory (optional) settings are listed as Required = True (Required = False). Name | Required | Default | Valid Values | Description --------|:----------:|-----------|----------------|--------------- task_meta_data|False|N/A|directory|GBDX Option. Output location for task meta data such as execution log and output JSON output_raster_uri|True|N/A|directory|Output for OUTPUT_RASTER. -- Value Type: ENVIURI **Output structure** The output_raster_uri file will be written to the specified S3 Customer Account Location. ### Background For additional background information on this task please refer to the [Harris Geospatial ENVI documentation](http://www.harrisgeospatial.com/docs/home.html) and [ENVI® Root Stretch Raster](http://www.harrisgeospatial.com/docs/envirootstretchrastertask.html). ### Contact If you have any questions or issues with this task, please contact [gbdx-support@digitalglobe.com](gbdx-support@digitalglobe.com).