Is it possible to use postgresql with QGIS and ArcGIS? One database for different clients. Is it anything that I have worry or any problems to use the DBMS from two different software? I know that I need PostGIS and ArcSDE and I can't manipulate or store raster data with PostGIS 1.5 in posgresql from QGIS. What would you recommend or what to avoid.
I sat in on a PostgreSQL/ArcSDE presentation (link1, link2) at this weeks Esri conference and they talked a little about this. They Esri product engineer said (at least I interpreted what she said) that:
From the sounds of it, if you want to do a direct connection to a PostGIS database (with simple features) you should be able to connect to the data through both ArcGIS 10.1 and QGIS.
Read more in the ArcGIS online help topic "A quick tour of geodatabases in PostgreSQL".