I want to organize data collection on the field (offline). The data in the office is stored in a PostgreSQL/PostGIS database. Is it possible to sync field work with the database? It seems that Collector is tied to ArcGIS Online. So is it possible to sync the data locally, not online?
The idea is to have everything fluid in the process (preparing for field work, getting the data in the database after field work)
Should I use a WFS service?