fix(backend): polygon geometries; remove holes, fix right hand rule (… #1416

Job	Run time
backend-test / check-img-cache	11s
frontend-unit-test / Run Frontend Tests	28s
backend-test / test-img-build	0s
backend-test / run-tests	3m 48s
frontend-build / build-image	1m 59s
frontend-build / scan-image	43s
smoke-test-frontend	56s
backend-build / build-image	1m 47s
backend-build / scan-image	28s
smoke-test-backend	1m 8s
deploy-containers / remote-deploy	1m 5s
	12m 33s

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