For what it's worth, I've been compiling Angkor era temples with
common name,
country,
nearest settlement,
coordinates,
relevant Panoramio photo,
source.

Up to 78 as of this writing. The photo can be helpful to tell if it's a mound of rocks, though perhaps of historic significance like Ak Yum, or a large site like Wat Phu in Lao or Preah Vihear in Cambodia. I mean Thailand. I mean Cambodia.

At some point, where I haven't, I'll plop them into Google Map Maker, OpenStreetMap, and WikiMapia and include columns on the spreadsheet. At least that's the long term intent.

For now, I've plugged a lot of the ones around Siem Reap into Google Map Maker. If you look at the Angkor Thom area, for instance, you'll probably see some unfamiliar sites.

Also, if you start at the West Baray and then pan north, there are several lesser sites. You can also search on "Prasat" (temple).

I'm sure I'm partially reinventing the wheel or at least recasting work done by some of the sources I'm using, but maybe there's added value in the Panoramio link and the mapping.