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| I use File | Open to open my color image file and it looks all black and white with little crosses! |
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Q. How can I load my color image in Surfer 9? I open it and it is black and white with little crosses. I create an image map and it is all gray.
A. Use the File | Import or Map | New | Base Map commands to load the image as it is, a colored image. If the image is georeferenced, loading it as a base map will preserve the map coordinates.
The File | Open command opens the image in the Grid Node Editor. The Grid Node Editor always displays information in black and white. Each grid node (pixels in this case) is represented by a cross. You can select each grid node and the X, Y and Z values of that grid node are reported at the top of the window. The X and Y coordinates are the pixel coordinates (unless it is georeferenced) and the Z values are calculated from the color of the image (unless it is a particular type of image file that contains a Z value for each pixel). You can use the Grid Node Editor to edit the Z values of any selected grid node.
Since Surfer 9 allows you to use a TIF file as a grid file, you can also use the image to create an image map (or any other grid-based map). The default color scale for an image map is black to white (what you see on the screen). You can double click on the image map, click on the Colors button, and change the color scale to anything you want. An image map is not the same as loading an image as a base map.
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