Also, on projects where GPS cant such as heavily wooded areas, how is control established to ensure accuracy? Are assumed coordinates used?
How did people understand and establish this in the 1600s?
Hello, I was hoping to ask this community for some help with some confusion I am having with my layers not matching up in QGIS, and specifically where I am going wrong with my understanding of coordinate reference systems, geographical reference systems, and projected coordinate systems. I was hesitant to post this, since of course there is so much content online that explains this, but I still am unfortunately struggling to understand why I am not able to apply these concepts. I will watch so many tutorial videos that start with the idea of "picture the earth like a sphere, such as an orange peel, you can't just lay the whole thing out flat!", and then just totally get lost afterwards. This confusion popped up again as I am trying to create buffers around centroids, and perform zonal statistics with an underlying raster layer, and the points are just not overlapping with the raster layer, and so I was hoping to ask for some help here so that I might be able to understand these concepts from an applied perspective.
So I have these layers, showing a polygons layer overlapped onto a clipped raster layer.
https://preview.redd.it/2migh5awzrg71.png?width=1278&format=png&auto=webp&s=f4e72b9158238e1145e2b9c72d62aeaf4ab8e14b
Looks good to me, though the problem is when I want to make my buffers. I find the centroids of these polygons, and try to draw buffers around each of them, only to find that the Distance is in degrees, when I want meters. From my understanding, to be able to switch the unit of measurement here from degrees to meters, I would need to "project" the polygons layer. Though I am confused since it appears that my layers already are projected, I think.
For reference, the CRS of my raster layer is:
EPSG:32618 - WGS 84 / UTM zone 18N - Projected
and the CRS of my polygons layers is:
Unknown CRS: GEOGCRS["WGS84(DD)",DATUM["WGS84",ELLIPSOID["WGS84",6378137,298.257223563,LENGTHUNIT["metre",1,ID["EPSG",9001]]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],CS[ellipsoidal,2],AXIS["geodetic longitude",east,ORDER[1],ANGLEUNIT["degree",0.0174532925199433]],AXIS["geodetic latitude",north,ORDER[2],ANGLEUNIT["degree",0.0174532925199433]]] - Projected
I tried changing my polygons layer to the same CRS as my raster layer, but then the polygons layer disappeared from being directly overlapped with the raster layer! That is what I don't understand. My raster layer and my polygons layer are now within the same CRS, yet d
... keep reading on reddit ➡Do your worst!
For context I'm a Refuse Driver (Garbage man) & today I was on food waste. After I'd tipped I was checking the wagon for any defects when I spotted a lone pea balanced on the lifts.
I said "hey look, an escaPEA"
No one near me but it didn't half make me laugh for a good hour or so!
Edit: I can't believe how much this has blown up. Thank you everyone I've had a blast reading through the replies 😂
They’re on standbi
Pilot on me!!
Dad jokes are supposed to be jokes you can tell a kid and they will understand it and find it funny.
This sub is mostly just NSFW puns now.
If it needs a NSFW tag it's not a dad joke. There should just be a NSFW puns subreddit for that.
Edit* I'm not replying any longer and turning off notifications but to all those that say "no one cares", there sure are a lot of you arguing about it. Maybe I'm wrong but you people don't need to be rude about it. If you really don't care, don't comment.
What did 0 say to 8 ?
" Nice Belt "
So What did 3 say to 8 ?
" Hey, you two stop making out "
I won't be doing that today!
You take away their little brooms
This morning, my 4 year old daughter.
Daughter: I'm hungry
Me: nerves building, smile widening
Me: Hi hungry, I'm dad.
She had no idea what was going on but I finally did it.
Thank you all for listening.
There hasn't been a post all year!
It’s pronounced “Noel.”
After all his first name is No-vac
What, then, is Chinese rap?
Edit:
Notable mentions from the comments:
-
Spanish/Swedish/Swiss/Serbian hits
-
French/Finnish art
-
Country/Canadian rap
-
Chinese/Country/Canadian rock
-
Turkish/Tunisian/Taiwanese rap
When I got home, they were still there.
There hasn't been a single post this year!
(Happy 2022 from New Zealand)
Bob
So that I could frequently say, "I am going to walk 5 miles now."
Edit: My most popular post on Reddit! 😀 Thank you for the awards.
Just to clarify, 12345678
Me grabbing a soda from my (what I thought was) half full 12pk...
Notices there's only 2;
Me: "Awe man... This is a damn bird box!" Her: "What the hell does that mean?!" Me: (Pulls both cans out & shows them to her) "It's only got Toucans."
I'm not ashamed to admit the look on her face was glorious.
I was just sitting there doing nothing.
“BOOM”?!
"That's what they're fighting about."
Because his Visa didn’t work.
Because the audience only responds in a low ha
