Automatic Georeferencing of Topographic Raster Maps

Automatic raster-vector conversion of topographic maps

Contour Lines Recognition from Raster Topographic Maps

Map digitization is still an ongoing research in development of GIS, photogrammetry, remote sensing, military, urban planning and etc. Majority of recent approach, either associates with human interaction or semi-automated process are insufficient in various aspects. There are usually time-consuming, inefficient, and shown inaccuracies in digitized data. This research is intended to develop an ...

Automatic Text Recognition from Raster Maps

Text labels in raster maps provide valuable geospatial information by associating geospatial locations with geographical names. Although present commercial optical character recognition (OCR) products can achieve a high recognition rate on documents, text recognition on raster maps is still challenging due to the varying text orientations and the overlapping between text labels. This paper pres...

Automatic Scree Representation for Topographic Maps

Scree – a mass of small stones covering a slope on a mountain – is extremely labour-intensive to reproduce on topographic maps when each stone is drawn separately. Th is is due to the large number of stones – typically several hundreds of stones per square centimetre in a scree fi eld. An automatic procedure to produce scree representations would therefore greatly simplify and accelerate the pr...

Automatic Contour Labeling for Scanned Topographic Maps

In many mapping organizations, existing topographic paper maps comprise the most complete source of elevation. data; the objective of this research is to capture the elevation data (which is in contour form) in a GIS. The topographic relief plate which shows no height information can be scanned into a GIS. The remaining task is then to label these isolines. This paper discusses a methodology fo...