Diskussion:WorldFileTool
Aus Geoinformation HSR
Version vom 26. April 2008, 21:14 Uhr von Stefan (Diskussion | Beiträge)
Workflow
- Get image to be referenced about a region on earth; e.g. a floor plan from a building ('building map').
- Start Google Earth, create "New overlay..." and georeference image.
- In Google Earth export overlay as KML (not KMZ) "Save As...".
- Start WorldFileTool
- Choose "Open KML..." (which includes already overlay title, image name, bbox)
- (optional) or 1. open image file (e.g. jpg), take worldfile (e.g .jpw)
- adds metadata in GUI:
- floor (-99..99, default)
- priority (0=nil=>unknown, 1..100, no default!)
- map type '<background> (1=Landkarte, 0=Gebäudeplan, default 0)
- title (String, default "Karte/Plan ohne Namen")
- using WorldFileTool do either...
- "Save KML" again (note: rotate image to north if needed, see below)
- (optional) Export world file
- (optional) Generate 'background map' (includes KML and image) (internet access required).
- Use georeferenced image in your GIS viewer (e.g. IndoorWPS), map server or GIS.
There exist alternatives to georeference an image: See GISpunkt Wiki (german) and freegeographytools.com.
Specifications
Floor: Stock. ACHTUNG:
- Erdgeschoss => first floor (en_GB: ground floor)
- 1. Stock => 2nd floor (US)
KML:
- Examples to test load/import (KML without metadata, image):
- http:files/amklusbach.zip
- Building map example to test export (KML, image):
- http:files/gebaeude.zip
- Background map example to test Google Maps export (KML, image):
- http:files/background.zip
- KML with priority
- (?upload)
Input with "unwanted" rotation parameter; image needs to be rotated to 'north', so that <rotation>-49.84368795876157</rotation> can be left out (= <rotation>0</rotation>):
<?xml version="1.0" encoding="UTF-8"?> <kml xmlns="http://earth.google.com/kml/2.2"> <GroundOverlay> <name>HSR-Gebäude 6 1. Stock</name> <Icon> <href>G6-2.png</href> <viewBoundScale>0.75</viewBoundScale> </Icon> <LatLonBox> <north>47.22384390486059</north> <south>47.22345122640866</south> <east>8.816304349533887</east> <west>8.815489285344636</west> <rotation>-49.84368795876157</rotation> </LatLonBox> </GroundOverlay> </kml>
Methoden
/* Assumes a world file of a north up image, unprojected and in WGS 84, defined with following affine transform parameters */ Point getlat2lon2(Image img, File worldfile) etc.