LUPMIS - GIS User Manual for Land Use Planning
Main menu:
- Home Page
- 0. Rationale
- 1. GIS handling
- 2. GIS data entry
- 2.1 Create new layer
- 2.2 Digitize line
- 2.3 Digitize point
- 2.4 Digitize polygon
- 2.5 Edit existing layer
- 2.6 Delete feature
- 2.7 Split line
- 2.8 Split polygon
- 2.9 Merge lines from different layers
- 2.10 Unite lines
- 2.11 Snap lines
- 2.12 Join polygons
- 2.13 Extend polygon
- 2.14 Insert island
- 2.15 Define unit surrounding islands
- 2.16 Create 'doughnut'
- 2.17 Fill 'doughnut' polygon
- 2.18 Fill polygon with 'holes'
- 2.19 Digitize parcels from sector layout
- 3. GIS operations
- 3.1 Create buffer
- 3.2 Create exclusion zone
- 3.3 Overlay units
- 3.4 Convert line to polygon
- 3.5 Derive statistics (area size, length)
- 3.6 Clip unit according to other unit
- 3.7 Create geographic grid
- 3.8 Move entire vector map
- 3.9 Move or copy individual features on a map
- 3.10 Adjust polygon to line
- 3.11 Convert points to polygon
- 3.12 Define by distance
- 3.13 Create multiple objects
- 3.14 Transfer styles from one layer to another
- 4. Attribute database
- 4.1 Start with database
- 4.2 Import database
- 4.3 Display database information
- 4.4 Enter attribute data
- 4.5 Attribute matrix of multiple layers
- 4.6 Seeds
- 4.7 Repair attribute data
- 4.8 Merge lines with attached database
- 4.9 Transfer attribute data from points to polygons
- 4.10 Copy styles, labels, attributes
- 5. Conversion of data
- 5.1 Points
- 5.1.1 Import list of points from text file
- 5.1.2 Import list of points from Excel file
- 5.1.3 Convert point coordinates between projections
- 5.1.4 Convert point coordinates from Ghana War Office (feet)
- 5.1.5 Convert point coordinates from Ghana Clark 1880 (feet)
- 5.1.6 Track with GPS
- 5.1.7 Download GPS track from Garmin
- 5.1.8 Download GPS track from PDA
- 5.2 Vector maps
- 5.3 Raster maps
- 5.3.1 Import raster map from external source
- 5.3.2 Quality-check raster file
- 5.3.3 Georeference scanned map
- 5.3.4 Re-georeference image
- 5.3.5 Load sector layout map
- 5.3.6 Shift raster map
- 5.3.7 Download Google Earth image
- 5.3.8 Clipping and masking images
- 5.3.9 Enhance georeferenced image
- 5.3.10 Batch-convert raster images
- 5.4 Communication with other GIS programs
- 5.4.1 Import GIS data from SHP format
- 5.4.2 Import GIS data from E00 format
- 5.4.3 Import GIS data from AutoCAD
- 5.4.4 Export LUPMIS data to other programs
- 5.4.5 Export GIS to AutoCAD
- 5.4.6 Change a shape file to GPX
- 5.4.7 Transfer GIS data to other LUPMIS installations
- 5.4.8 Digitize lines in Google Earth
- 5.5 Terrain data
- 5.1 Points
- 6. Presentation
- 7. GIS for land use planning
- 8. LUPMIS Tools
- 9. Databases
- Annexes
- A1. Map Maker setup
- A2. Background to cartography and raster images
- A3. Glosssary
- A4. Troubleshooting
- A5. Styles
- A6. Classification for land use mapping and planning
- A7. GIS utilities
- A8. Map projection parameters
- A9. Maps in pilot areas
- A10.Standards
- A11. LUPMIS distribution CD
- A12. Garmin GPS
- A13. Training
- A14. ArcView
- A15. Population statistics
- A16. Entry and display of survey data
- A17. External exercises
- A18. Programming
- A19. Paper sizes
- A20. Various IT advices
- A21. Site map and references
3.6 Clip unit according to other unit
3. GIS operations
3.6 Clip Unit according to other Unit
Level of expertise required for this Chapter: Advanced; general Map Maker training
Very often, there is the need to cut a unit (polygon or line) according to another polygon unit. For example, if you have the altitude (or hydrology) map of a large area, but want to have only that part, which falls within your planning area, you want to cut it.
Main menu > Edit > Show Selection Manager > Select-tool (at toolbar left) > Select unit(s) to be cut > Selection Manager window: Actions > Extent > Trim vectors to polygons > Trim vectors to polygons window: Polygon file > Select folder and file, which ‘cuts’ > Open > OK
You can also cut the entire live layer:
In live layer mode: Right-mouse > Live layer actions > Live layer actions window: Extent > Trim vectors to polygon > OK > > Trim vectors to polygons window: Polygon file > Select folder and file, which ‘cuts’ > Open > OK
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Remember, there is also the Cutter-tool from the toolbar left. See Chapter 2.8 for the procedure to ‘split’ a polygon.
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Alternatively, when digitizing and you want to use a new polygon to be ‘cut’ with another polygon also in the live layer, you can do that right after digitizing.
After closing the polygon with right-mouse > Polygon window > Actions > Trim live layer to polygon > OK
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As another alternative you can use the Intersect option to clip a layer according to another layer:
Main menu > Utilities > Vector utilities > Intersect / Unite files > Intersect lines and polygons window: Add file > Select folder and file to be ‘cut’ > Open > Again: Add file > Select folder and file to cut > Open > Tick ‘Find intersections’ > Tick ‘Tidy boundaries’ > Execute > Save result as > Select folder > Give new temporary filename > Save > Quit
If the feature is with a database attached, see Chapter 4 for specific considerations.
Sub-Menu:
- 3.1 Create buffer
- 3.2 Create exclusion zone
- 3.3 Overlay units
- 3.4 Convert line to polygon
- 3.5 Derive statistics (area size, length)
- 3.6 Clip unit according to other unit ←
- 3.7 Create geographic grid
- 3.8 Move entire vector map
- 3.9 Move or copy individual features on a map
- 3.10 Adjust polygon to line
- 3.11 Convert points to polygon
- 3.12 Define by distance
- 3.13 Create multiple objects
- 3.14 Transfer styles from one layer to another