[Qgis-us-user] New to QGIS and Spatial analysis

Randal Hale rjhale at northrivergeographic.com
Tue Mar 15 06:53:25 PDT 2022


Hey Mike - Welcome to the list. 

So the short answer is yes and the longer answer is Yes it's a little complicated but doable. 

For the explanation I''m going to completely ignore projections - that's a whole other 
discussion. 

If you had a point (like a tower) you could run the buffer tool and buffer it one mile. From 
there I think you would "clip by mask layer" and extract the image. You could save that as 
a geotiff or whatever you needed. Life would be good. (I say all that like you know where 
the tools are - look for processing at the top of QGIS - that gives you processing tools). 

The bigger problem is the imagery - you can't clip Google Satellite imagery and use that 
per the license from Google. So you would need another image source be it landsat or 
something local (maybe the county you're working in has imagery they would share). 
Imagery is a pain. 

Really - that's the kicker - the imagery. Get that and then there's the whole discussion on 
"get it in a local projection" and you're done - it's about three steps in QGIS to get what 
you want. 

It's completely doable! I dunno how much this has helped but you're on the right track. 

Commands: 
https://docs.qgis.org/testing/en/docs/user_manual/processing_algs/qgis/
vectorgeometry.html#qgisbuffer[1]
https://docs.qgis.org/testing/en/docs/user_manual/processing_algs/gdal/
rasterextraction.html#gdalcliprasterbymasklayer[2]

Yell if you need anything! 
Randy



On Monday, March 14, 2022 7:10:56 PM EDT Mike Seskin wrote:

> Preamble:
> 
> 
>   1.  I've been unsuccessfully searching for answers online for several days
>   2.  I am new to spatial analysis and GIS, and therefore trying to figure out what it can 
and
> cannot do
> 
> Question:
> 
> I recently installed QGIS in the hopes it can help me create satellite image files from a 
shape
> file consisting of points.  I want to automatically define an area (for instance 1 square 
mile)
> around each point and save the Google satellite image of each of the 1-square mile 
areas.  Is
> this possible in QGIS?
> 
> Thanks
> 
> Mike Seskin | EQL
> Office: (858) 694-1851  |  Cell: (442) 245-1779
> Email: seskin_michael_x at solarturbines.com
> Solar Turbines Incorporated
> 
> 
> 
> Caterpillar: Confidential Green
-- 
-------------
Randal Hale 
North River Geographic Systems, Inc 
https://www.northrivergeographic.com
(p) 423.653.3611 
(e) rjhale at northrivergeographic.com

--------
[1] https://docs.qgis.org/testing/en/docs/user_manual/processing_algs/qgis/
vectorgeometry.html#qgisbuffer
[2] https://docs.qgis.org/testing/en/docs/user_manual/processing_algs/gdal/
rasterextraction.html#gdalcliprasterbymasklayer
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