On the command-line, the vector (overlay) must be entered after the image to end up on top in DstImage. $ convert -composite SrcImage.tif SrcVector.svg DstImage.png The ImageMagic command for combining images, or vectors, is -composite. ImageMagick can be used for putting a vector on top of an image, that is how I get the global shoreline on top of the rainfall map at the top of this page. $ inkscape -z -e DstImage.png -w w -h h SrcVector.svg Vector overlay You can also use InkScape for converting vector files to images, either from InkScape’s graphical interface, or using the Terminal: $ convert -background none -density 72 -resize wx SrcVector.svg DstImage.png svg files in ImageMagick), set -background to none: If you want to remove the white background (that at least I seem to get when I use. $ convert -density 72 -resize wxh! SrcVector.svg DstImage.png To force a non-proportional image, set both width ( w) and height ( h) followed by an exclamation mark (“!”): $ convert -density 72 -resize wx SrcVector.svg DstImage.png If this did not work, add the ImageMagick function -density, and instead try: $ convert -resize wx SrcVector.svg DstImage.png If you want the image to have a specific size, you should be able to use the ImageMagick usual function -resize (the example sets the image size using the width ( w), height will be set proportionally): svg file.Īssuming that you have a vector file (.svg) and want to just convert it to an image (rasterize in GIS jargon), the ImageMagick Terminal command is: If you do not have a vector file, go ahead and draw a vector in InkScape and save it as a. Any editing that I need to do is then done in IncScape. The vector files that I use for map layout are produced from a Geographical Information System (GIS), introduced in another blog. svg format) used for overlay ImageMagick vector processing For my Homebrew installation it is:īut you should not have to worry about that if your InkScape installation completed without errors. If macOS does not find the command $ inkscape you need to give the full path to the InkScape app, but that depends on your installation. When the installation is ready, start inkscape from the Terminal It will take quite some time for Homebrew to install (it took an hour for me). $ brew install caskformula/caskformula/inkscape To install InkScape using Homebrew, start a Terminal session and type at the command-line: Here I will only go through the Homebrew installation. Both alternatives are outlined on the Inkscape site. For macOS you can install Inksape either using Homebrew (introduced in this post) or use an installer that first installs XQuartz and then Inkscape. Inkscape is an open source vector graphics editor available for all major operating systems. How this is done is explained in this post. I use InkScape and ImageMagick for creating vector overlays on image maps, like the global shoreline on the map image at the top of this page. This post assumes that you installed and got acquainted with ImageMagick, introduced in an earlier post and then further elaborated in another post.
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