Firstly, open the main window of TMGeoReg. Then use the Open Layer button to open a vector dataset which will assist you to locate your image.
TMGeoReg ships with a basic outline of the countries of the world. This is adequate as a reference to place many maps, but if more localised datasets are required they can be downloaded over the internet using TMWin.
Users can add as many GIS vector datasets as they need to the window, and modify the symbology by double clicking on the dataset entry in the legend panel at the bottom of the window.
Once the reference GIS data is on-screen, use the Open Image to Register button to bring your image on-screen.
The image will be placed arbitrarily in the window -- use the pointer tool to move the image or adjust the size of the image by dragging on the red corner marks.
By default, dragging on any of the red corner marks will resize the image proportionally, ie, it will keep the height-to-width ratio of the image and prevent distortion. To disable this safeguard (patricularly useful for images which are not in lat/long), disable the Resize Proportionally option in the toolbar.
Once the image is placed in its correct location, there are several options for exporting the locational information.
In the toolbar of the main window, clicking on the WRL button will create an worldfile (ESRI ArcView/ArcINFO format, naming convention [imagefile].jgw for .jpegs and [imagefile].sdw for .sids) in the same directory as your image; clicking on the TAB button will create a MapInfo .tab file (naming convention [imagefile].tab) in the same directory as your image.
These two options are very useful for creating image metadata that will allow you to open the image in a conventional GIS. By and large, however, users will be more interested in using TMGeoReg to create metadata to splice intoTimeMap metadata (.tmm) files. This function is carried out from the Metadata tab.
Once an image has been placed on the main screen, clicking on the metadata tab will display a worksheet with the appropriate metadata values for insertion into a .tmm file. It includes date, format, datatype, bounding box and worldfile information, all of which TMGeoReg has gleaned from your placement of the image on the map.
If you have already started work on a TimeMap metadata (.tmm) file for your that image, and you want to splice these element directly into that .tmm file, choose the 'Merge with TMM file' option on the right. TMGeoReg will ask you to specify the destination .tmm file, and will then splice the elements directly in to that file.
If you don't have a TimeMap metadata (.tmm) file already started for the image, simply press the 'Save as template' button on the right, and TMGeoReg will save the elements in a temporary worldfile metadata template (.tmm) file (you will need to specify a name and location). Later, when you have started your .tmm file for the image, just use the Metadata Editor's template function to splice in the worldfile metadata, and then you can delete the worldfile template if you like.
