GIS-34: PROGRESS IN MAP REVISION PROCESSES
Order No: |
GIS-34 |
Total Length: |
90 minutes |
It is widely recognized that the revision of digital topographic
databases is the main task of map makers for the future;
superimposition of new imagery and both old and new map data is an
important, effective but not entirely perfect tool; and there is wide
interest and some practical success in detecting and recording change
for small-scale mapping using satellite imagery, with automation
already making some impact on practical procedures.
Devising Automated Technology for Large-Scale Mapping in Bulgaria
Reference No: |
GIS 34-1 |
A brief (8-minute) overview of an automated technology for compilation and revision of large-scale maps by photogrammetric measurements which was devised at the Photogrammetry and Remote Sensing Section of the Geodesy And Photogrammetric Company for Research and Technology, in Sofia, Bulgaria.
Lecturer: |
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Suitability for |
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Duration: |
12 minutes | |||
Year of |
1992 | |||
Suggested |
Automatic Revision of the European Community's Corine Land Cover Database Using Satellite Images
Reference No: |
GIS 34-2 |
The CORINE Land-Cover Project, dating the land-code database for the whole of Europe, is producing a number of data layers covering the whole of the European Community. The idea is to create a map of the whole European Community at 1:100,000 scale, which means covering an area of 2.25 million HA. Digitized parcels plus class attributes constitute the database. The initial database production is based on a manual photo-interpretation method, utilizing mainly satellite photos (not digital).
Lecturer: |
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Suitability for |
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Duration: |
25 minutes | |||
Year of |
1992 | |||
Suggested |
Semi-Automatic Revision of Topographic Maps from Satellite Images
Reference No: |
GIS 34-3 |
he main aim of the project was to develop a prototype computer system to perform semi-automatic revision of 1:50,000 topographic map data in digital form by means of pattern recognition of satellite imagery of 10 and 20m resolution. The proposed revision result is inspected and can be manually corrected by an operator before the map data base is updated.
Lecturer: |
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Suitability for |
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Duration: |
20 minutes | |||
Year of |
1992 |
Evaluation of Spot Data for Topographic Map Revision at the National Land Survey of Sweden
Reference No: |
GIS 34-4 |
In 1990 the first map sheets of the new topographical map were published and produced by the National Land Survey of Sweden. The new map has an increased amount of feature types compared to earlier maps, including clearings. Introducing clearings in the new map required frequent revisions. The planned revision cycle is every 5 years for a few sets of objects, and every 10 years with a larger set of objects. After 20 years a new map is made with fieldwork. The question here is what type of image material (SPOT vs high-altitude aerial photographs) to use for the different revision types.
Lecturer: |
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Suitability for |
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Duration: |
9 minutes | |||
Year of |
1992 |
Reference No: |
GIS 34-5 |
The presentation focuses on a study analyzing the precision of image superimposition in analytical plotters using mono systems.
Lecturer: |
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Suitability for |
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Duration: |
24 minutes | |||
Year of |
1992 | |||
Suggested |
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