"I am wondering how noticeable is an .05 to .06 improvement"
However it's measured I still think this difference is not going to be noticed or missed.
I also think there are several other things that would make a much bigger impact on the decision. Most of these have been mentioned but I'll list them here:
Direction of scope/good horizon
Under a flight path to an airport???
+500 meters higher is that much less atmosphere to look through
Roads paved, gravel, dirt
( BTW, I'm not trying to be disrespectful or antagonistic at all, just my 2c )
Not to nitpick, but to clarify for others who may be reading, you cut off the end of the quote that specified how it was measured. The actual original question was:
"I am wondering how noticeable is an .05 to .06 improvement on the SQL scale, as measured from the light pollution map page?
That's how it's measured for purposes of this thread, by the maps. I haven't done any individual readings.
What I'm asking in this thread is how much weight I should put on slight (but consistent) differences in the light pollution maps for two general areas. The area around Centerville and the area around Bickleton. There is a slight but consistent difference of about .05 in the light pollution map and, as discussed, also a slight difference in color in the dark site finder map in the land all around these two general areas.
You are correct that other factors should also be considered. And I would add an additional factor that hasn't been added to the list: Snow. An area that is more remote at higher elevation is less likely to get plowed in the winter and may only be accessible by snow mobile. So that is one more thing I will investigate before buying any particular property.
But, I am not asking for the purpose of site selection. I am asking for the purposes of narrowing down the general area to begin my search, either around Bickleton or Centerville, both of which are big areas with dozens of potentially suitable sites and a lot of variation among individual sites. Obviously I will look at those factors again as applied to individual sites once I start visiting sites, but first I need to narrow down the general area to begin my search.
It sounds like you are saying I should not give much weight to slight map differences as a factor and should look more to other factors. That's the type of feedback I was looking for, so that's helpful.
But there doesn't seem to be consensus on that point since others have said slight differences on the maps colors/numbers can be quite noticeable. If there are darker sites to be had in Bickleton then it might be worthwhile to begin the search there, even though (or maybe because) it is a little further out.
Edited by Ihtegla Sar, 13 June 2019 - 10:11 AM.