Hello there
I need to access the (text) baseline geometry of an annotation feature. I'm aware that with annotations, the feature geometry contains the (readonly and auto-updated) bounding box of the text element, so I have to get the symbol using the element field.
Using the normal query mechanism I'm able to get its value and decoding it from binary (using atob()) I can see the coordinates of the start and the end point of the line, but not its spatial reference. This leaves me in trouble as the stored coordinates are in a different coordinate system than the map's one. Unfortunately I haven't been able to find any SDK functionality that offers me to access this binary string as I didn't find any support for CIMTextGraphic.
So my question would be: How can I convert/deserialize this binary string into a fully processable format with JavaScript?
This is an example what my code looks like so far:
const extent: Extent = getCurrentExtent();
const features = await query.executeQueryJSON(myAnnotationLayerUrl, {
spatialRelationship: "intersects",
outSpatialReference: extent.spatialReference,
outFields: ["*"],
returnGeometry: true,
geometry: extent,
}).then(features => {
for (const feature of features.features) {
const element = getFieldAs<string>(feature.attributes, "element");
const baseline = atob(element);
// returns something like:
// 1 *K390314.56620000023,5820539.9339000005;390333.81819999963,5820487.34149999922Musterstraße8�AV-!r@
}
})
