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
- 4. Attribute database
- 4.1 Start with database
- 4.2 Import database
- 4.3 Display database information
- 4.3 Retrieve database information
- 4.4 Enter attribute data
- 4.5 Edit attribute data
- 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 Export and import styles and labels
- 4.11 Select and display
- 4.12 Copy data: DRA, DBF
- 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
- 5.4 Communication with other GIS programs
- 5.1 Points
- 6. Presentation
- 7. GIS for land use planning
- 8. Database
- 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. MS Access
- A19. Paper sizes
- A20. Site map and references
5.3.7 Download Google Earth image
5. Conversion of data > 5.3 Raster maps
5.3.7 Download Google Earth Image
Level of expertise required for this Chapter: Advamced
Legal Note: Documentation below explains the technical process. It does not authorize the use of these images. Legal conditions have to be checked on a case-by-case base; they can change on short notice. Downloaded images are only for orientation and non-commercial use.
1) Define the coordinates in lat / long decimal degrees (for example: Left Longitude: 0.04 > Right Longitude: 0.05 > Top Latitude: 5.76 > Bottom Latitude: 5.75). Don’t have more than 0.01 deg in latitudinal and longitudinal direction (approximately 1 km) to avoid geographical distortion. Western longitude values are entered as negative numbers.
2) Load the software Google Satellite Maps Downloader. (If not already installed, procure it on-line from the internet or contact TCPD-HQ / LUPMIS for advice)
3) Google Satellite Maps Downloader: Project name: LUPMIS > Longitude and latitude: As defined in step 1 above > Zoom: 18 > Threads count: 4 > Specify path to save > Download
Note: Zoom level 18 has a resolution (pixel size) of 60 cm, very often ‘QuickBird’ data.
4) View the downloaded images: Tools > Satellite images viewer
5) Combine the images to one: Tools > Combine images > Select GMID file > Combine. Downloading might take some time….
6) In Paint Shop Pro: Convert BMP format (16-bit) to JPG format (File > Open > Select folder and filename, under BMP format > Open > File > Save As > Type: JPG > Save)
If necessary, enhance colours / contrast.
7) View log file and read the lat / long coordinates of the entire image (in ..._log.txt): Tools > View log now
8) Load the conversion program GeoTrans95: Convert two corners to UTM.
- NW corner: Latitude: Top > Longitude: Left
- SE corner: Latitude: Bottom > Longitude: Right
See Chapter 5.1.3, with Input: Geodetic, Output: UTM. Be aware, that you might have to enforce the UTM zone (30 or 31).
9) In Map Maker: Georeference the image: Main menu > Utilities > Bitmap utilities > Calibrate scans > Two known points and use the NW and SE corner to calibrate (see Chapter 5.3.3).
10) Display the map in Map Maker and assess the horizontal accuracy against GPS data.
11) If necessary, minor shifts can be made in Map Maker (see Chapter 5.3.6).
12) Repeat these steps 1-11, till you have covered your entire area of interest.
13) In Map Maker: Mosaic all individual images to one large image (Main menu > Utilities > Bitmap > Bitmap utilities > Mosaic and clip, see Chapter 5.3.1-D).
Do not exceed maximum recommended size (6x3 km at a resolution of 80-100 cm, see Chapter 5.3.1-D).
Sub-Menu: