Hi Grant, Perhaps th is link can be useful to you : https://scientiaplusconscientia.wordpress.com/tag/sentinel/
Cheers ! Hernán On 10 May 2017 at 16:00, <[email protected]> wrote: > Send Qgis-user mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.osgeo.org/mailman/listinfo/qgis-user > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Qgis-user digest..." > > > Today's Topics: > > 1. Merging Sentinel Images (Grant Boxer) > 2. Re: Keeping only POIs X kms from a trace? (Matt Boyd) > 3. Crashing (Allan Younger) > 4. Re: Crashing (Nyall Dawson) > 5. Re: Keeping only POIs X kms from a trace? (Winfried) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 10 May 2017 08:50:43 +0800 > From: "Grant Boxer" <[email protected]> > To: <[email protected]> > Subject: [Qgis-user] Merging Sentinel Images > Message-ID: <[email protected]> > Content-Type: text/plain; charset="utf-8" > > I am attempting to merge two adjacent Sentinel 2 images, but when I do it > via the Raster > Miscellaneous > Merge option, I get the two merged parts > with a different scaling in the merged image. Any suggestions on how to get > a consistent scaling across the entire merged image? > > > > Grant Boxer > > Maylands, Western Australia, 6931 > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.osgeo.org/pipermail/qgis-user/ > attachments/20170510/f7eda543/attachment-0001.html> > > ------------------------------ > > Message: 2 > Date: Wed, 10 May 2017 13:18:05 +1000 > From: Matt Boyd <[email protected]> > To: Winfried <[email protected]> > Cc: qgis-user <[email protected]> > Subject: Re: [Qgis-user] Keeping only POIs X kms from a trace? > Message-ID: > <CAFgHUGL+RBkYmWYy7vU=9wj1kvZvnFMrVCYHepHH7RRu8R=vrw > @mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Hi Winfried, > usually in QGIS, unless it's specified differently, the distance field is > in the same units as the project properties. So, 5km would be 5000m in the > the projected UTM zones which use meters. > If 0,05 worked then I assume that your project is in > degrees/minutes/seconds (https://en.wikipedia.org/wiki/Decimal_degrees) > which is approximately 5km at the equator, close enough for what you want > to do this time. > > One of the key things you'll need to know about if you keep working on GIS > stuff is projections, QGIS can automatically reproject for map displays. > However, when doing a calculation / operation that involves 2 or more > inputs then I make sure to reproject all the inputs to the same system and > work on those files only (save as and select a common projection) knowing > the UTM zone or whatever meters/feet projection is used locally is helpful > when you need to work out distances and areas in useful units. > > Matt > > > > On Tue, May 9, 2017 at 7:22 PM, Winfried <[email protected]> wrote: > > > Thank you. > > > > Turns out I was pretty close to the solution: The error was in the order > > parameters were set in the Spatial Query dialog. Also, there is no > > information on the unit used for Distance in the Fixed Distance Buffer; I > > guess "0,05" means 5kms. > > > > <http://osgeo-org.1560.x6.nabble.com/file/n5319849/QGIS.png> > > > > I'll see if a simple Python script can perform the same thing, or even > > split > > campsites into regions instead of whole nations. > > > > > > > > -- > > View this message in context: http://osgeo-org.1560.x6. > > nabble.com/Keeping-only-POIs-X-kms-from-a-trace-tp5319730p5319849.html > > Sent from the QGIS - User mailing list archive at Nabble.com. > > _______________________________________________ > > Qgis-user mailing list > > [email protected] > > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.osgeo.org/pipermail/qgis-user/ > attachments/20170510/e8a4f438/attachment-0001.html> > > ------------------------------ > > Message: 3 > Date: Wed, 10 May 2017 03:54:38 +0000 > From: "Allan Younger" <[email protected]> > To: [email protected] > Subject: [Qgis-user] Crashing > Message-ID: <em4ea9ad0d-5f29-486e-8c2b-1a16491d31bd@ufo2> > Content-Type: text/plain; charset="utf-8"; Format="flowed" > > I am having major problems with the latest QGIS 2.18.7 crashing all the > time with only a very small number of layers open. > Have uninstalled & re-installed 3 times. > Previous versions handled huge amount more data. > Running a 64 bit 16gb wind 7pro system. > Allan Younger > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.osgeo.org/pipermail/qgis-user/ > attachments/20170510/33baca45/attachment-0001.html> > > ------------------------------ > > Message: 4 > Date: Wed, 10 May 2017 14:39:37 +1000 > From: Nyall Dawson <[email protected]> > To: Allan Younger <[email protected]> > Cc: qgis-user <[email protected]> > Subject: Re: [Qgis-user] Crashing > Message-ID: > <CAB28Asi08cy_jZbNree5YX7kv_N1YcUbmHWq2cN0mW1YM6qafw@mail. > gmail.com> > Content-Type: text/plain; charset=UTF-8 > > On 10 May 2017 at 13:54, Allan Younger <[email protected]> wrote: > > I am having major problems with the latest QGIS 2.18.7 crashing all the > time > > with only a very small number of layers open. > > Have uninstalled & re-installed 3 times. > > Previous versions handled huge amount more data. > > Running a 64 bit 16gb wind 7pro system. > > Allan Younger > > Can you please check: > 1. do you have on the fly reprojection enabled? > 2. are any layers in your project in a different projection to the > project itself? > 3. if so, does removing these layers from the project help? > > Nyall > > > ------------------------------ > > Message: 5 > Date: Wed, 10 May 2017 02:36:09 -0700 (MST) > From: Winfried <[email protected]> > To: [email protected] > Subject: Re: [Qgis-user] Keeping only POIs X kms from a trace? > Message-ID: <[email protected]> > Content-Type: text/plain; charset=us-ascii > > Thanks for the infos. I didn't know about CRS, although I could have > guessed > that it wouldn't make sense to specify meters when GPX files contain data > in > latitude + longitude, ie. degrees. I used 0,05 by trial and error. > > > > -- > View this message in context: http://osgeo-org.1560.x6. > nabble.com/Keeping-only-POIs-X-kms-from-a-trace-tp5319730p5320022.html > Sent from the QGIS - User mailing list archive at Nabble.com. > > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Qgis-user mailing list > [email protected] > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user > > ------------------------------ > > End of Qgis-user Digest, Vol 135, Issue 14 > ****************************************** >
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