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

Tue Mar 15 09:36:47 PDT 2022

Hey Mike,

if your requirements are global here are some pointers

* NAIP is for us Agricultural lands only but a good source (USA only) there

* Bing maps have a more permissive lic than Google you can find out what
that includes

* Regional and local coverage for imagers is spotty using local city/region
etc services

* Planet (labs) has great imagery but afaik they are not selling individual
imagery of one point in time  but a like an ongoing subscription mostly for
mobile apps and web maps less for but would be good to find out exactly

* If you are to do this more often as noted Landsat (and SPOT) imagery are
sources, however have a resolution of 30 m, 
so Sentinel 2 imagery might be the better choice with global coverage (at up
to 10m resolution) see here https://scihub.copernicus.eu/

* If using satellite imagery for this you might want to learn the SCP
plug-in that was created by Luca Congedo that can make false color images ,
correction and land cover analysis in QGIS see here with tutorials and all
https://fromgistors.blogspot.com/p/semi-automatic-classification-plugin.html

Cheers
Karsten

  _____  

From: Qgis-us-user [mailto:qgis-us-user-bounces at lists.osgeo.org] On Behalf
Of Mike Seskin
Sent: Tuesday, March 15, 2022 09:15
To: Randal Hale; qgis-us-user at lists.osgeo.org; Doug Newcomb
Subject: Re: [Qgis-us-user] New to QGIS and Spatial analysis

Randy / Doug 

Thanks for all the great info on imagery sources.  Ironically (Randy) you
mentioned gas turbines, which happens to be connected to my whole reason for
investigating GIS.  Therefore my imagery requirements are global since our
engines our scattered throughout the world.  I'll investigate some of the
sources you provided, excluding the localized ones.

Mike Seskin | EQL 
Office: (858) 694-1851  |  Cell: (442) 245-1779
Email: seskin_michael_x at solarturbines.com
Solar Turbines Incorporated 

Caterpillar: Confidential Green

From: Randal Hale <rjhale at northrivergeographic.com> 
Sent: Tuesday, March 15, 2022 8:10 AM
To: qgis-us-user at lists.osgeo.org; Mike Seskin
<Seskin_Michael_X at solarturbines.com>
Subject: Re: [Qgis-us-user] New to QGIS and Spatial analysis

  _____  

CAUTION: EXTERNAL EMAIL 
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Use caution when opening unexpected emails and do not click on links or
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  _____  

That's awesome. 

Google imagery (assuming you're using QuickMapServices) is pushed through a
service and I think those services are usually pretty locked down with
licensing plus it's a service so it's just harder to deal with. 

So I **think** you can purchase Google imagery - not sure of the cost. 

Depending on where you are and what you're doing here's what I would do: 

1. Check with the local City/County and see if they have imagery. It will be
probably 6 inch to 1 foot in resolution. There may be a charge or it may be
free. Example:  Hamilton County TN has an image service that QGIS can use
and they sell imagery. 

2. Check with the state you are in and see what they have. I would search
for "State of Mike GIS Data" (with Mike being the state you're in) and see
what pops up. Example: The state has an imagery service and they sell
imagery to the general public and to counties. Go back to 1 and they
(county) may give you what they purchased. Tn has free LIDAR data for
download also. 

3. Federal is the next step - NAIP (1 meter). That's free and may be awesome
for what you want or may not be.
https://www.fsa.usda.gov/programs-and-services/aerial-photography/imagery-pr
ograms/naip-imagery/
<https://urldefense.com/v3/__https:/www.fsa.usda.gov/programs-and-services/a
erial-photography/imagery-programs/naip-imagery/__;!!M7dyoZOwuwF45AU!g_b3G6D
WyLQszl5jNIBPPCq1kjBm0NqE5eTkVOtsJulvNT91Ke2fDYsgLnYAIDj1r4oCDkNZ7H4$>  

4. Weird use cases that may have imagery in the area - like some utilities
will fly their own imagery and have that available if you ask nice (I was a
former Federal Utility Employee in Tennessee which had some gas turbines).

5. Landsat will completely work but I think that may still be 30 meter pixel
size - but it's free. There are some other satellite imagery that is free
also - you're just trading resolution for cost. 

6. Planet labs sells imagery - but not sure of the cost on that on either. 

Yeah - that's the hard part -  imagery. Software is easy - imagery makes my
head hurt. 

Randy

On Tuesday, March 15, 2022 10:10:35 AM EDT Mike Seskin wrote:

> Hi Randal - thanks very much for this high level overview, it's incredibly
helpful for a beginner

> like me!

> 

> I took some excellent earlier direction from Karsten who pointed me
towards a solution using the

> graphical modeler - it seemed perfect until I ran it and encountered some
inexplicable error with

> the Google satellite raster - that is until I read your reply, and now it
makes sense!  What a

> bummer about the licensing  -- as you said the imagery is the kicker!

> 

> Are my following imagery options correct?

> 

> 

>   1.  Purchase a license from Google

>   2.  Use landstat for free

> 

> 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

> From: Randal Hale <rjhale at northrivergeographic.com>

> Sent: Tuesday, March 15, 2022 6:53 AM

> To: qgis-us-user at lists.osgeo.org; Mike Seskin
<Seskin_Michael_X at solarturbines.com>

> Subject: Re: [Qgis-us-user] New to QGIS and Spatial analysis

> 

> ________________________________

> CAUTION: EXTERNAL EMAIL

> This is a message from rjhale at northrivergeographic.com
<mailto:rjhale at northrivergeographic.com%3cmailto:rjhale at northrivergeographic
.com%3E> <mailto:rjhale at northrivergeographic.com%3E.

> Use caution when opening unexpected emails and do not click on links or
attachments from unknown

> senders. For more resources, visit http://security.cat.com/phishing.

> ________________________________

> 

> 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/vecto
rgeometry.html#qgisbuf
<https://urldefense.com/v3/__https:/docs.qgis.org/testing/en/docs/user_manua
l/processing_algs/qgis/vectorgeometry.html*qgisbuf__;Iw!!M7dyoZOwuwF45AU!g_b
3G6DWyLQszl5jNIBPPCq1kjBm0NqE5eTkVOtsJulvNT91Ke2fDYsgLnYAIDj1r4oCCQM7GRc$> 

>
fer<https://urldefense.com/v3/__https:/docs.qgis.org/testing/en/docs/user_ma
nual/processing_algs/q

>
gis/vectorgeometry.html*qgisbuffer__;Iw!!M7dyoZOwuwF45AU!kH6lFpUw2LB9mr5_sJC
7Zg6MmXJdUngpW3rDnn-6N

> jHwqzsxp1QIcIxEKimYAZTIwRUeetxWcrE$>

> 

>
https://docs.qgis.org/testing/en/docs/user_manual/processing_algs/gdal/raste
rextraction.html#gdalc
<https://urldefense.com/v3/__https:/docs.qgis.org/testing/en/docs/user_manua
l/processing_algs/gdal/rasterextraction.html*gdalc__;Iw!!M7dyoZOwuwF45AU!g_b
3G6DWyLQszl5jNIBPPCq1kjBm0NqE5eTkVOtsJulvNT91Ke2fDYsgLnYAIDj1r4oCyZZmSyI$> 

>
liprasterbymasklayer<https://urldefense.com/v3/__https:/docs.qgis.org/testin
g/en/docs/user_manual/

>
processing_algs/gdal/rasterextraction.html*gdalcliprasterbymasklayer__;Iw!!M
7dyoZOwuwF45AU!kH6lFpU

> w2LB9mr5_sJC7Zg6MmXJdUngpW3rDnn-6NjHwqzsxp1QIcIxEKimYAZTIwRUez1pQDmU$>

> 

> 

> 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
<mailto:seskin_michael_x at solarturbines.com%3cmailto:seskin_michael_x at solartu
rbines.com%3E> <mailto:seskin_michael_x at solarturbines.com%3E

> > 

> > Solar Turbines Incorporated

> > 

> > 

> > 

> > 

> > 

> > 

> > 

> > Caterpillar: Confidential Green

> 

> --

> 

> -------------

> 

> Randal Hale

> 

> North River Geographic Systems, Inc

> 

> https://www.northrivergeographic.com
<https://urldefense.com/v3/__https:/www.northrivergeographic.com*3Chttps:/*u
rldefense.com/v3/__https:/www.northrivergeographic.c__;JS8!!M7dyoZOwuwF45AU!
g_b3G6DWyLQszl5jNIBPPCq1kjBm0NqE5eTkVOtsJulvNT91Ke2fDYsgLnYAIDj1r4oCxGWHR38$
> <https://urldefense.com/v3/__https:/www.northrivergeographic.c

>
om__;!!M7dyoZOwuwF45AU!kH6lFpUw2LB9mr5_sJC7Zg6MmXJdUngpW3rDnn-6NjHwqzsxp1QIc
IxEKimYAZTIwRUexeg9u2g

> $>

> 

> (p) 423.653.3611

> 

> (e) rjhale at northrivergeographic.com
<mailto:rjhale at northrivergeographic.com%3cmailto:rjhale at northrivergeographic
.com%3E> <mailto:rjhale at northrivergeographic.com%3E

-- 

-------------

Randal Hale 

North River Geographic Systems, Inc 

https://www.northrivergeographic.com
<https://urldefense.com/v3/__https:/www.northrivergeographic.com__;!!M7dyoZO
wuwF45AU!g_b3G6DWyLQszl5jNIBPPCq1kjBm0NqE5eTkVOtsJulvNT91Ke2fDYsgLnYAIDj1r4o
CoAMojnU$> 

(p) 423.653.3611 

(e) rjhale at northrivergeographic.com

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