Re: [Qgis-user] Movement patterns

[Mike Flannigan]

I think Stefan has already given you a better answer
than the one I have.  I turn lat/long points into linear
geojson's in a single text file (outside of QGIS) and
then import the geojson into QGIS.  However, in my case
there is no timestamp, so it's probably not what you want.

On the other hand, geojson will take timestamps:
https://stackoverflow.com/questions/28989123/saving-timestamp-with-coordinates-geojson

Below is an example of just one of hundreds of lines
in the single geojson file.

"type": "FeatureCollection",
"crs": { "type": "name", "properties": { "name": 
"urn:ogc:def:crs:OGC:1.3:CRS84" } },


"features": [
{ "type": "Feature", "properties": { "id": 7, "name": "fgsde - 3-2014 - 
Waypoint Track" }, "geometry": { "type": "LineString", "coordinates": [ 
[ -95.16603, 29.6906 ],  [ -95.16813, 29.69177 
],  [ -95.1695, 29.69258 ],  [ -95.17018, 29.693 ],  [ 
-95.17167, 29.6939 ], [ -95.17293, 29.694616667 ],  
[ -95.37587, 29.7328 ],  [ -95.37198, 29.73323 
],  [ -95.37043, 29.73407 ],  [ -95.37027, 
29.73425 ],  [ -95.37008, 29.73447 ],  [ 
-95.369016667, 29.73615 ],  [ -95.36735, 29.7383 ],  [ 
-95.365216667, 29.74097 ],  [ -95.36327, 29.74305 
],  [ -95.36308, 29.74315 ],  [ -95.36293, 
29.74323 ],  [ -95.36293, 29.74323 ],  [ 
-95.36278, 29.74328 ],  [ -95.36248, 
29.74338 ],  [ -95.36248, 29.74338 ],  [ 
-95.36218, 29.74345 ],  [ -95.362016667, 29.74347 
],  [ -95.36187, 29.74348 ],  [ -95.3617, 
29.74348 ],  [ -95.36027, 29.74323 ],  [ 
-95.35853, 29.74255 ],  [ -95.35678, 29.74147 
],  [ -95.35295, 29.73898 ],  [ -95.34965, 29.7369 ],  [ 
-95.34588, 29.73448 ],  [ -95.34257, 29.7319 ],  
[ -95.33938, 29.72957 ],  [ -95.33658, 
29.72777 ],  [ -95.3312, 29.72433 ],  [ 
-95.327916667, 29.722216667 ],  [ -95.3248, 29.72037 ],  
[ -95.31987, 29.7178 ],  [ -95.3164, 29.71567 ],  [ 
-95.31175, 29.71265 ],  [ -95.30847, 29.710416667 ],  [ 
-95.30365, 29.7072 ],  [ -95.30015, 29.70487 ],  [ 
-95.29658, 29.70258 ],  [ -95.29423, 29.70085 
],  [ -95.29217, 29.69877 ],  [ -95.290116667, 
29.697216667 ],  [ -95.28925, 29.6967 ],  [ -95.289016667, 
29.696616667 ],  [ -95.28875, 29.69655 ],  [ -95.2885, 
29.69648 ],  [ -95.28827, 29.69647 ],  [ 
-95.288016667, 29.69648 ],  [ -95.28778, 
29.69653 ],  [ -95.28755, 29.696616667 ],  [ -95.2873, 
29.69675 ],  [ -95.28707, 29.69687 ],  [ 
-95.286816667, 29.697 ],  [ -95.28403, 29.6985 ],  [ 
-95.27975, 29.701 ],  [ -95.27745, 29.70267 ],  [ 
-95.27518, 29.70438 ],  [ -95.2744, 29.70497 ],  
[ -95.2731, 29.705916667 ],  [ -95.27163, 29.706916667 
],  [ -95.27015, 29.70773 ],  [ -95.269016667, 29.7083 ],  [ 
-95.26753, 29.70853 ],  [ -95.26625, 29.70848 
],  [ -95.2626, 29.70827 ],  [ -95.2608, 29.70828 ],  [ 
-95.25737, 29.707716667 ],  [ -95.25485, 29.7073 ],  [ 
-95.250616667, 29.7066 ],  [ -95.247616667, 29.7061 ],  [ 
-95.24477, 29.70588 ],  [ -95.24157, 29.70615 
],  [ -95.23493, 29.70677 ],  [ -95.228416667, 
29.70747 ],  [ -95.22655, 29.7082 ],  [ -95.223616667, 
29.709516667 ],  [ -95.22128, 29.70997 ],  [ 
-95.217116667, 29.7105 ],  [ -95.211516667, 29.71105 ],  [ 
-95.20657, 29.711516667 ],  [ -95.20395, 29.71175 ],  [ 
-95.20227, 29.71188 ],  [ -95.20163, 
29.71193 ],  [ -95.20135, 29.71195 ],  [ -95.2013, 29.71195 ],  
[ -95.2013, 29.71195 ],  [ -95.2009, 29.712 ],  [ -95.19977, 
29.7121 ],  [ -95.1984, 29.712216667 ],  [ -95.19828, 
29.71223 ],  [ -95.19817, 29.71175 ],  [ -95.19715, 
29.71087 ] ] } }


]
}


The result is something that looks like this:
http://www.mflan.com/temp/routes_-_svg.svg

It works quite well.


Mike



On 10/15/2019 5:39 AM, qgis-user-requ...@lists.osgeo.org wrote:

Date: Tue, 15 Oct 2019 05:52:58 +
From: Taimur al said
To:"qgis-user@lists.osgeo.org"  
Subject: [Qgis-user] Movement patterns
Message-ID:



Content-Type: text/plain; charset="iso-8859-1"

Hi all,

I have a series of GPS coordinate points and i would like to connect these 
points using a line creating a movement pattern. These points will connect 
using time and date for sequencing.

Can someone help me figure how to present this data on Qgis.

Regards,
Taimur


Wildlife Biologis

Re: [Qgis-user] Movement patterns

[Anita Graser]

This should have gone to the list:

On Tue, Oct 15, 2019, 21:34 Anita Graser  wrote:

> Dear Falk,
>
> On Tue, Oct 15, 2019 at 8:59 PM Falk Huettmann 
> wrote:
>
>> Hi Anita,
>> thanks, I looked at it but have a hard time to see and understand
>> details, e.g. how done, and what the actual items perform.
>> Would you have some insights ?
>>
>
> Input point layers have to contain a trajectory (or moving object) ID and
> timestamps.
>
> - Add heading to points takes a point layer and adds a heading column
> based on the direction of the line between consecutive points
> - Add speed to points takes a point layer and adds a speed (m/s) column
> based on the distance and time difference between consecutive points
> - Trajectories from point layer takes a point layer and creates a line
> layer by connecting consecutive points
> - Day trajectories from point layer does the same as Trajectories from
> point layer but creates one line for each day. So if your observations
> contain multiple days, you'll get more shorter lines.
>
> There is sample data in the plugin folder. On Windows, the path is
> something like:
>
>
> C:\Users\anita\AppData\Roaming\QGIS\QGIS3\profiles\default\python\plugins\processing_trajectory\sample_data
>
> Hope this helps.
>
> Regards,
> Anita
>
>
>
>
>
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Re: [Qgis-user] Movement patterns

[Anita Graser]

Hi Taimur,

On Tue, Oct 15, 2019 at 7:52 AM Taimur al said 
wrote:

> I have a series of GPS coordinate points and i would like to connect these
> points using a line creating a movement pattern. These points will connect
> using time and date for sequencing.
>

The Trajectools plugin provides a "Trajectories form point layer" function
for exactly this purpose.

https://plugins.qgis.org/plugins/processing_trajectory/

In addition, Trajectools can add speed and heading information to points,
split trajectories by date, and clip trajectories to a bounding box.

Regards,
Anita
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[Qgis-user] Postprocessing SCP-plugin

[Carolina Rey]

Hello everybody,

I have done the land use classification with ESA SNAP and imported it in QGIS. 
I would like to change a couple of houses which are black (shadows) so they 
turn into red (buildings). As I haven't done the classification with QGIS I 
have tried to apply the postprocessing but when I want to set the bands, it is 
not possible to choose the raster with the classification of the ESA SNAP. What 
could I?

See the screenshot above (the only option in the "select the input raster" ist 
the one shown).

[cid:98a81c4a-ef57-43d6-b611-bc43ff38eb8f]

Thnak you very much
Carolina

[https://ipmcdn.avast.com/images/icons/icon-envelope-tick-green-avg-v1.png]
 Libre de virus. 
www.avg.com
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Re: [Qgis-user] QField crowdfunding

[Matthias Kuhn]

Thanks for the heads up Bernd.

We really totally forgot to announce the crowdfunding on this list, an 
inexcusable mistake indeed.


In order to give everyone a fair chance to contribute ;) the 
crowdfunding period was extended to end of next week, October 25.


https://www.opengis.ch/projects/qfield-love/

Best regards

Matthias in the name of the OPENGIS.ch team.


On 10/14/19 7:55 PM, Bernd Vogelgesang wrote:

After not using QField for a while, I was completely surprised to find
out that there is a crowdfunding initiative running till 16.10.19.

I now searched the mailing list entries and could not find a trace of an
annoucement. How can this be?

So, for those interested in donating, the link:

https://www.opengis.ch/projects/qfield-love/

Cheers,
Bernd


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[Qgis-user] GRASS does not load when initiating QGIS 3.8 ZANZIBAR (MAC OS X)

[Edvard Magnus Baardsen]

I have in earlier QGIS versions used GRASS without problems.

I have recently downloaded QGIS ZANZIBAR from 
https://qgis.org/en/site/forusers/download.html 
 (Official all-in-one, signed 
installers), but on initiating QGIS I get an error message saying "GRASS Init 
Error: GRASS was not found in ‘/usr/local/opt/osgeo-grasss/grass-base’ 
(GISBASE), provider and plugin will not work.” 

On opening a project the GRASS panel is indeed greyed out.

QGIS 3.4 gives the same problem.
 
I have uninstalled and reinstalled QGIS a couple of times, but to no avail. Can 
anyone give me some advice?

Best regards

Edvard Magnus Baardsen
Lusaka, Zambia

Tel: +260 964 853 929
ebaard...@gmail.com

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