CREATE VIEW dbo.ParcelsWithArea AS SELECT ParcelID, OwnerName, Shape.STArea() AS SqMeters, Shape FROM dbo.Parcels; Connect AutoCAD to the view , not the table. Now every polygon automatically displays its calculated area. Before a surveyor saves a new boundary, a SQL Server trigger can validate the geometry:
For decades, a silent battle has raged in the AEC (Architecture, Engineering, and Construction) and GIS (Geographic Information Systems) industries: The CAD vs. GIS data disconnect. AutoCAD users deal in precise vectors, layers, and blocks. SQL Server users deal in tables, indexes, and queries. sql server spatial autocad
Install AutoCAD Map 3D or Civil 3D. Learn the MAPCONNECT command. Point it at your SQL Server. If you are a DBA: Create a geometry column in your asset table. Grant the AutoCAD users SELECT and UPDATE permissions on that column. CREATE VIEW dbo
SQL Server Spatial gives your CAD data . AutoCAD gives your SQL data visual precision . Together, they turn a pile of lines into an enterprise asset. Need to start? Open SSMS, run CREATE TABLE , then open AutoCAD Map 3D and click "Data Connect" > "SQL Server Spatial". The learning curve is two hours; the efficiency gain is permanent. GIS data disconnect
// Inside AutoCAD's Editor using (SqlConnection conn = new SqlConnection(connectionString))
CREATE TRIGGER trg_CheckClosed ON dbo.Parcels INSTEAD OF INSERT AS BEGIN IF EXISTS (SELECT * FROM inserted WHERE Shape.STIsClosed() = 0) BEGIN THROW 50001, 'Polygon is not closed', 1; END -- Insert valid data END; | AutoCAD Expectation | SQL Server Reality | Fix | | :--- | :--- | :--- | | 10,000 lines (instant load) | 10,000 polygons (slow load) | Create a spatial index with BOUNDING_BOX matching your DWG extents. | | Annotations rotate with view | Text is static | Store annotation as separate geometry points; use Map 3D's Dynamic Annotation . | | Undo/Redo is infinite | Undo requires a commit | Set AutoCAD Autosave to 5 minutes. | | Coordinate system: assumed | Coordinate system: explicit | Always set SRID (Spatial Reference ID). For DWG feet: SRID = 0 (geometry). For lat/lon: SRID = 4326 (geography). | Code Sample: Convert a DWG Polyline to SQL Server Geometry If you are writing a .NET plugin for AutoCAD using C#, you can directly insert into SQL Server:
The era of exporting a DWG to SHP, then SHP to SQL, then editing, then re-exporting back to DWG is over.