I recently began using the Hungarian Gazetteer of 1877. I found it quite useful. However, there are several icons used for which I was not able to find the "key" to their meaning. The first icon is a circle with a dot in the center. The second icon looks like a bugle. The third icon looks like a small car with two white dots that seem to be headlights (this interpretation would seem to be an anachronism).
I post this to the whole group because it may be of general interest. The bugle is a post office. Circle with dot is a marketplace.
The book, "Handy Guide to Hungarian Genealogical Records" by Jared H. Suess is extremely helpful. Published by Everton Publishers, Inc., P.O. Box 368, Logan, Utah 84321.