INNOVATION IN gOVERNmENT
Survey Department of Sri Lanka
city of Jaffna gIs Model
Jaffna, Sri Lanka
located in the northern province of Sri lanka, the city of Jaffna took advantage
of advances in digital photogrammetry to develop a 3D city GIS. The 3D GIS
model will support city planning activities in the areas of telecommunications,
disaster management, homeland security, facilities management, and
infrastructure development. The Sri lanka Survey Department created the 3D
GIS model from stereo pairs of aerial photographs covering 10 square kilometers.
Using Bentley map and other photogrammetric applications, the department
created the digital terrain model and orthophoto, applied the topological vector
layers, and built the database with elevations. The ability to use Bentley map
to integrate GIS and photogrammetric techniques enabled the department to
deliver an effective 3D GIS model for the city of Jaffna.
Maintaining road Assets in Bentley Map
In Denmark, Svendborg Kommune recently outsourced all maintenance of roads,
streets, paths, and pedestrian areas. To develop an accurate overview of the
municipality’s assets, a field survey was conducted using mobile smart phone
GpS coordinates, vehicle tracking, and aerial photograph digitization. All data
was read directly into Bentley map as Xml Feature modeling (XFm) schema.
more than 100 features were created using Bentley’s XFm architecture, which
ensured data standards were enforced. From within Bentley map, sheets
can be created for employees to quickly review asset information. It cost
about $185,000 to generate asset data for maintenance in Bentley map. The
municipality expects to save about $190,000 the first year as a result of more
accurate tenders from firms bidding on road maintenance projects.