SampleServer6 - Feature Server Generate Renderer operation

Ahmed_S — Wed, 02 Nov 2022 12:27:52 GMT

Dear Community,

For a school project I need to make use of the Arcgis REST API. At this moment I am struggling with the generate renderer operation. From the documentation I know that you have to pass a classification definition that can look like this:

{ "type": "classBreaksDef", "classificationField": "<field name>", "classificationMethod": "<esriClassifyNaturalBreaks | esriClassifyEqualInterval | esriClassifyQuantile | esriClassifyStandardDeviation | esriClassifyGeometricalInterval>", "breakCount": <count>, "standardDeviationInterval": < 1 | 0.5 | 0.33 | 0.25 >, //use when classificationMethod is esriClassifyStandardDeviation. //optional. use to normalize class breaks "normalizationType": "<esriNormalizeByField | esriNormalizeByLog | esriNormalizeByPercentOfTotal>", "normalizationField": "<field name>", //use when normalizationType is esriNormalizeByField //optional. use to define symbol for classes "baseSymbol": <symbol>, "colorRamp": <colorRamp> } { "type": "uniqueValueDef", "uniqueValueFields": ["<field name 1 >","<field name 2>","<field name 3>"], "fieldDelimiter": "field_delimiter_character", //optional. use to define symbol for unique values "baseSymbol": <symbol>, "colorRamp": <colorRamp> } //uniqueValue classification definition with symbology { "type": "uniqueValueDef", "uniqueValueFields": ["Type", "AdminClass"], "fieldDelimiter": ",", "baseSymbol": { "type": "esriSLS", "style": "esriSLSSolid", "width": 2 } "colorRamp": { "type": "algorithmic", "fromColor": [115,76,0,255], "toColor": [255,25,86,255], "algorithm": "esriHSVAlgorithm" } }

However I am not sure what the <fieldName> value should be. Everytime I try to pass in a value I get an error saying it could not find one or more unique value fields.

for reference see:

sampleserver6

Generate Renderer documentation page

Classification definition documentation page

Thanks in advance!

Re: SampleServer6 - Feature Server Generate Renderer operation

Ahmed_S — Mon, 07 Nov 2022 10:44:51 GMT

The unique value filed should be one of these:

I got it to work putting one of the fields above.

topic SampleServer6 - Feature Server Generate Renderer operation in ArcGIS REST APIs and Services Questions

SampleServer6 - Feature Server Generate Renderer operation

Re: SampleServer6 - Feature Server Generate Renderer operation