https://community.esri.com/t5/arcgis-online-questions/polygon-changing-during-projection/m-p/1219004#M48214 <P>Does your polygon only have 4 vertices? Because&nbsp; a re-projection only moves the vertices and still draws straight lines between them. I've seen this cause re-projection issues, like the one you describe, before. If you can densify the polygon, adding extra vertices along straight edges, you tend to get a better re-projection result.</P> Wed, 05 Oct 2022 15:47:38 GMT RichardHowe 2022-10-05T15:47:38Z https://community.esri.com/t5/arcgis-online-questions/polygon-changing-during-projection/m-p/1219001#M48213 <P>Riddle me this.&nbsp; I have a polygon (<A href="https://services6.arcgis.com/fzPZZJiNVtryYcsC/ArcGIS/rest/services/Shelby_Landuse_AGOL/FeatureServer/0/query?where=&amp;objectIds=332724&amp;time=&amp;geometry=&amp;geometryType=esriGeometryEnvelope&amp;inSR=&amp;spatialRel=esriSpatialRelIntersects&amp;resultType=none&amp;distance=0.0&amp;units=esriSRUnit_Meter&amp;relationParam=&amp;returnGeodetic=false&amp;outFields=&amp;returnGeometry=true&amp;returnCentroid=false&amp;featureEncoding=esriDefault&amp;multipatchOption=xyFootprint&amp;maxAllowableOffset=&amp;geometryPrecision=&amp;outSR=&amp;defaultSR=&amp;datumTransformation=&amp;applyVCSProjection=false&amp;returnIdsOnly=false&amp;returnUniqueIdsOnly=false&amp;returnCountOnly=false&amp;returnExtentOnly=false&amp;returnQueryGeometry=false&amp;returnDistinctValues=false&amp;cacheHint=false&amp;orderByFields=&amp;groupByFieldsForStatistics=&amp;outStatistics=&amp;having=&amp;resultOffset=&amp;resultRecordCount=&amp;returnZ=false&amp;returnM=false&amp;returnExceededLimitFeatures=true&amp;quantizationParameters=&amp;sqlFormat=none&amp;f=pjson&amp;token=" target="_self">here</A>&nbsp;) when I query for it with no specific SRID everything looks fine.</P><P>Taking the same polygon and requesting it in 4326 appears to totally change the shape to encompass the world.&nbsp; <A href="https://services6.arcgis.com/fzPZZJiNVtryYcsC/ArcGIS/rest/services/Shelby_Landuse_AGOL/FeatureServer/0/query?where=&amp;objectIds=332724&amp;time=&amp;geometry=&amp;geometryType=esriGeometryEnvelope&amp;inSR=&amp;spatialRel=esriSpatialRelIntersects&amp;resultType=none&amp;distance=0.0&amp;units=esriSRUnit_Meter&amp;relationParam=&amp;returnGeodetic=false&amp;outFields=&amp;returnGeometry=true&amp;returnCentroid=false&amp;featureEncoding=esriDefault&amp;multipatchOption=xyFootprint&amp;maxAllowableOffset=&amp;geometryPrecision=&amp;outSR=4326&amp;defaultSR=&amp;datumTransformation=&amp;applyVCSProjection=false&amp;returnIdsOnly=false&amp;returnUniqueIdsOnly=false&amp;returnCountOnly=false&amp;returnExtentOnly=false&amp;returnQueryGeometry=false&amp;returnDistinctValues=false&amp;cacheHint=false&amp;orderByFields=&amp;groupByFieldsForStatistics=&amp;outStatistics=&amp;having=&amp;resultOffset=&amp;resultRecordCount=&amp;returnZ=false&amp;returnM=false&amp;returnExceededLimitFeatures=true&amp;quantizationParameters=&amp;sqlFormat=none&amp;f=pjson&amp;token=" target="_self">Here</A></P><P>Any ideas how to recognize this situation and avoid them?</P> Wed, 05 Oct 2022 15:39:41 GMT https://community.esri.com/t5/arcgis-online-questions/polygon-changing-during-projection/m-p/1219001#M48213 AaronFortener 2022-10-05T15:39:41Z https://community.esri.com/t5/arcgis-online-questions/polygon-changing-during-projection/m-p/1219004#M48214 <P>Does your polygon only have 4 vertices? Because&nbsp; a re-projection only moves the vertices and still draws straight lines between them. I've seen this cause re-projection issues, like the one you describe, before. If you can densify the polygon, adding extra vertices along straight edges, you tend to get a better re-projection result.</P> Wed, 05 Oct 2022 15:47:38 GMT https://community.esri.com/t5/arcgis-online-questions/polygon-changing-during-projection/m-p/1219004#M48214 RichardHowe 2022-10-05T15:47:38Z