Czech people married in the bride's parish of origin, and frequently began their married life in the groom's parish of origin.
I knew where the groom was from. Mniší.
I knew the bride's first name, but not her surname (her maiden name). After they married, they went back to Mniší to live, and went on to have 9 kids there. I knew her approximate birth date because I had her death record in Mniší. I knew the couple's approximate marriage date because I had found their children (well, all the ones born in Mniší).
I wanted to learn more about the wife's family. I guessed she was probably from a neighboring parish. I pulled up google maps and saw that a close town to them was Kopřivnice.
I decided to look at historical map for ideas. An easy, easy, easy, easy, EASY way to do this is to go to mapy.cz, search for a village, click "změnit mapu" and then select "Historická." This will give a basic historical map. It's not as detailed as other cadastral maps, but it is great at giving you an overall aerial view of the Czech lands, it's free, and it's fast.
Doing this, it became clear that Nesselsdorf, probably the pre-Kopřivnice name of this place, was a lot further from Mniší than I had thought, and that Vlčovice, Tichá, and Lichnov were more probable candidates. I searched these parish registers.
I found the marriage record in Vlčovice.
The best part? It identified the groom from Mniší. This was the right record!
Obviously, it would be best to get a TRULY contemporary map. I was searching for a record in the mid 1700's. The historical maps on mapy.cz are circa 1830-1840, so a century later. But, as I said, they are easy to use, free, and fast. I needed a 275 year old map, but a 185 year old map was better than a current map at giving me an idea about what the landscape was like.
In hindsight, if I had zoomed in closer on my google maps search, I would have seen Vlčovice. Doh!