search

frank-engel-usgs / VMT

The Velocity Mapping Toolbox
Other
19 stars 12 forks source link

Feature request: Black/White only depth/layer averaged vectors in Planview plot #13

Open frank-engel-usgs opened 6 years ago

frank-engel-usgs commented 6 years ago

User and co-creator Bruce Rhoads writes

I continue to face the issue of color versus black and white renderings of images in journals. In VMT, depth-averaged vectors are plotted using a color scheme for magnitude. I know we have dealt with this issue before, but is there a way to render the vectors in black, with magnitude proportional to length. This is often needed to present these data in B&W. I think a version was developed to do this, but not sure if it is a specialty version of the program.

Co-developer Ryan Jackson suggests a workaround:

The easiest workaround is to choose the "gray" colormap in the VMT Graphic Control window (Plan View Map section). The vectors are color coded on a grey scale in this case with both color and length representing magnitude. There are other grey colormaps (CPT files) that you can download to your machine here. There might even be one that is all black somewhere on the cpt-city site. You can also make an all black CPT colormap and use it.

The other option is to go into VMT source code and make the change there to use all black.

Alternatively, you can export the DAV vector data (Excel output) in VMT and plot it in ArcGIS as black vectors (choose an arrow facing up as your symbol, graduated symbol size by magnitude, and under advanced settings for symbology choose rotation by attribute and use the direction from true north).

In the future, we should add a setting to the graphic control window to allow black vectors.

We will add this functionality to VMT.

frank-engel-usgs commented 6 years ago

Further request to allow output format to include EMF, and for resolution to be specified, or at least give the ability to output 1200 dpi for journal publication use.