Re: [Qgis-user] satellite basemap of New York city for qgis2web

[Patrick Dunford]

I don't use qgis2web. I use the XYZ tiles export tools in the processing 
toolbox to create tiles of my maps, which then go onto a fairly ordinary 
apache/php server with Leaflet running in the front end. Leaflet pulls 
in a WMTS layer aerial background in a very straightforward way.


HTML and javascript are not that hard to code with, for any of these 
solutions.


On 8/03/21 5:33 am, Stephen Sacks wrote:
Thanks Phil for your reply.  My knowledge of html and Java is 
minimal.  I need  qgis2web to write it for me.   I got an aerial view 
from Mapbox  that looks OK with my polygon and point layers in my 
desktop QGIS.  But qgis2web crashes unless I select OpenLayers or 
Leaflet.  When I send the qgis2web output files to my web host 
(infinityFree) the aerial view layer is missing. (You can see it at 
www.temp5.epizy.com, showing a few of the 35 gardens along Brooklyn's 
Promenade.) I hope a DoITT  aerial view will work with qgis2web.  I've 
tried geoServer but can't figure out how to make it give me a DoITT  map.



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Re: [Qgis-user] noobs -- question

[Brent Wood]

 Yep, I think Alexandre is correct.

Change this to:
create table bidule (id serial primary key, libelle text, geog 
geography(multipolygon, 4326));
or, given you already have the table:
alter table bidule add constraint bidule_pk primary key (id);


You might find this link 
useful:https://www.cadlinecommunity.co.uk/hc/en-us/articles/36579817-PostGIS-Why-can-I-not-edit-my-PostGIS-data-within-QGIS-
Cheers


On Monday, March 8, 2021, 1:58:12 PM GMT+13, Marc Millas 
 wrote:  
 
 Hi,
create table bidule (id serial, libelle text, geog geography(multipolygon, 
4326));

as simple as possible :-)
thanks for your help !


Marc MILLASSenior Architect+33607850334www.mokadb.com


On Mon, Mar 8, 2021 at 1:25 AM Alexandre Neto  wrote:

Hello Marc,
Can you share your table SQL definition?
My gut feeling is that you might not have a unique identifier column.

Alexandre NetoQGIS Supportwww.cooperative.net

On Sun, Mar 7, 2021 at 9:51 PM Marc Millas  wrote:

Hi,I may be missing something more than obvious, but ...QGIS 3.16 on win 10, 
postgres 12 with postgis 3.1 (same, machine (intel core i9, 64 GB ram, 6TB 
SSD))a postgis table with a column geography(multipolygon, 4326)-no pb to 
display this as a layer over whatever map (OSM standard as an exemple).-no pb 
in qgis to go to edition mode, and add a few new polygons, edit the table 
fields and save. fine.When I want to edit (ie. change..) one of the existing 
polygons, I:--ask to go to edit mode with right click on that postgis 
layer--select one of the existing polygons, (after choosing the select entity 
icon)--??? according to the doc, I should click on the edit node icon. Which is 
grayed.the qgis postgres user have all rights to write (proof by the inserts 
done)
So.. there is something obvious somewhere, but I need some help to guess where 
:-)thanks for your help,regards,

Marc MILLASSenior Architect+33607850334www.mokadb.com
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Re: [Qgis-user] noobs -- question

[Marc Millas]

Hi,

create table bidule (id serial, libelle text, geog geography(multipolygon,
4326));


as simple as possible :-)

thanks for your help !



Marc MILLAS
Senior Architect
+33607850334
www.mokadb.com



On Mon, Mar 8, 2021 at 1:25 AM Alexandre Neto  wrote:

> Hello Marc,
>
> Can you share your table SQL definition?
> My gut feeling is that you might not have a unique identifier column.
>
> Alexandre Neto
> QGIS Support
> www.cooperative.net
>
> On Sun, Mar 7, 2021 at 9:51 PM Marc Millas  wrote:
>
>> Hi,
>> I may be missing something more than obvious, but ...
>> QGIS 3.16 on win 10, postgres 12 with postgis 3.1 (same, machine (intel
>> core i9, 64 GB ram, 6TB SSD))
>> a postgis table with a column geography(multipolygon, 4326)
>> -no pb to display this as a layer over whatever map (OSM standard as an
>> exemple).
>> -no pb in qgis to go to edition mode, and add a few new polygons, edit
>> the table fields and save. fine.
>> When I want to edit (ie. change..) one of the existing polygons, I:
>> --ask to go to edit mode with right click on that postgis layer
>> --select one of the existing polygons, (after choosing the select entity
>> icon)
>> --??? according to the doc, I should click on the edit node icon. Which
>> is grayed.
>> the qgis postgres user have all rights to write (proof by the inserts
>> done)
>>
>> So.. there is something obvious somewhere, but I need some help to guess
>> where :-)
>> thanks for your help,
>> regards,
>>
>>
>> Marc MILLAS
>> Senior Architect
>> +33607850334
>> www.mokadb.com
>>
>> ___
>> Qgis-user mailing list
>> Qgis-user@lists.osgeo.org
>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>>
>
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Re: [Qgis-user] noobs -- question

[Alexandre Neto]

Hello Marc,

Can you share your table SQL definition?
My gut feeling is that you might not have a unique identifier column.

Alexandre Neto
QGIS Support
www.cooperative.net

On Sun, Mar 7, 2021 at 9:51 PM Marc Millas  wrote:

> Hi,
> I may be missing something more than obvious, but ...
> QGIS 3.16 on win 10, postgres 12 with postgis 3.1 (same, machine (intel
> core i9, 64 GB ram, 6TB SSD))
> a postgis table with a column geography(multipolygon, 4326)
> -no pb to display this as a layer over whatever map (OSM standard as an
> exemple).
> -no pb in qgis to go to edition mode, and add a few new polygons, edit the
> table fields and save. fine.
> When I want to edit (ie. change..) one of the existing polygons, I:
> --ask to go to edit mode with right click on that postgis layer
> --select one of the existing polygons, (after choosing the select entity
> icon)
> --??? according to the doc, I should click on the edit node icon. Which is
> grayed.
> the qgis postgres user have all rights to write (proof by the inserts done)
>
> So.. there is something obvious somewhere, but I need some help to guess
> where :-)
> thanks for your help,
> regards,
>
>
> Marc MILLAS
> Senior Architect
> +33607850334
> www.mokadb.com
>
> ___
> Qgis-user mailing list
> Qgis-user@lists.osgeo.org
> List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
>
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[Qgis-user] noobs -- question

[Marc Millas]

Hi,
I may be missing something more than obvious, but ...
QGIS 3.16 on win 10, postgres 12 with postgis 3.1 (same, machine (intel
core i9, 64 GB ram, 6TB SSD))
a postgis table with a column geography(multipolygon, 4326)
-no pb to display this as a layer over whatever map (OSM standard as an
exemple).
-no pb in qgis to go to edition mode, and add a few new polygons, edit the
table fields and save. fine.
When I want to edit (ie. change..) one of the existing polygons, I:
--ask to go to edit mode with right click on that postgis layer
--select one of the existing polygons, (after choosing the select entity
icon)
--??? according to the doc, I should click on the edit node icon. Which is
grayed.
the qgis postgres user have all rights to write (proof by the inserts done)

So.. there is something obvious somewhere, but I need some help to guess
where :-)
thanks for your help,
regards,


Marc MILLAS
Senior Architect
+33607850334
www.mokadb.com
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[Qgis-user] satellite basemap of New York city for qgis2web

[Stephen Sacks]

Thanks Phil for your reply.  My knowledge of html and Java is minimal.  
I need  qgis2web to write it for me.   I got an aerial view from Mapbox  
that looks OK with my polygon and point layers in my desktop QGIS.  But 
qgis2web  crashes unless I select OpenLayers or Leaflet.  When I send 
the qgis2web output files to my web host (infinityFree) the aerial view 
layer is missing. (You can see it at www.temp5.epizy.com, showing a few 
of the 35 gardens along Brooklyn's Promenade.) I hope a DoITT aerial 
view will work with qgis2web.  I've tried geoServer but can't figure out 
how to make it give me a DoITT  map.


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Re: [Qgis-user] Trimble GeoXT 2005 Accuracy

[kirk]

Hi Springer.I assume your raw data files are being converted to gpx on  a 
computer since the raw terrasync files are proprietary binary files. If you are 
using trimble pathfinder, you can post process differentialy correct the data 
if you have access to  base station logged at the same time you captured your 
field data.  Having a base station 100 miles away will not improve your results 
as the baseline is too long.I do not know if you can write a gpx file directly 
from pathfinder but I would not bother. I would write a shapefile which will 
contain the coordinate system you specify.  Simply open in qgis and you should 
be good to go. If your older unit works better, I would expect it may be an 
issue with the setup within pathfinder or perhaps the software version.I think 
your consistent offset is a direct result of how you are converting your data 
from trimble to gpx.As I mentioned in my previous comments, there are many 
issues which affect accuracy.  Just because the box says it is accurate  you 
will rarely replicate that in the field.  In terms of WAAS dataframes, these 
are processed internally on your field unit.Kirk Schmidt Sent from my Galaxy
 Original message From: Springfield Harrison 
 Date: 2021-03-07  5:57 a.m.  (GMT-04:00) To: kirk 
, Jorge Gustavo Rocha , 
qgis-user@lists.osgeo.org, Greg Troxel , Dan 
<19dm...@gmail.com>, Nicolas Cadieux  Subject: Re: 
[Qgis-user] Trimble GeoXT 2005 Accuracy 
Hello All,
  
  Thanks for the comments, I'll reply more fully tomorrow.
  
  The receiver is Trimble mapping grade:
  
  "The GeoExplorer 2005 series consists of:
  • The GeoXH™ handheld, providing subfoot (30 cm) accuracy, or even
  8-inch (20 cm) accuracy
  with the optional Zephyr™ antenna.
  • The GeoXT™ handheld offering submeter accuracy for GIS data
  collection and data
  maintenance.
  • The GeoXM™ handheld with 1–3 meter GPS accuracy for mobile GIS
  applications."
  
  "Post processed carrier accuracy: 1-30cm".  This receiver was
  probably $5-8000 (?) new.


  Data collection was stationary, open sky, good satellite
coverage, several minutes of 5 sec observations, good PDOP
  SBAS and/or post processed
  

The concern is not the accuracy as such, but the systematic NW
  shift.  This has been observed over several months, consistently. 
  My old Trimble ProXR (1994?, $20K new!) is actually better in this
  regard than the GeoXT!
  
  The Trimble manuals make no mention of the SBAS CRS, implying
  "turn it on and go, the receiver will integrate the SBAS into the
  rover file."  
  
  More tomorrow, thanks . . . . .

-
Cheers, Spring






On 06/Mar/2021 15:56, kirk wrote:


  
  A few notes.
  
  
  sbas which is waas in north America is based on
equatorial satellites which will get you in the 1 m range in
southern Canada. 
  
  
  you can achieve sub decimeter accuracy
consistently using rtk ,either through a ntrip  caster (base
station) broadcasting over the intenet or with your own base
station and a radio link. there are a few chip sets and break
out boards that you acquire and assemble your own system. This
is a very inexpensive option.
  
  
  Another option in Canada is to use precise point
positioning (PPP) which requires 6 to 12 hours of observation
data using L1, L2 or L1 and L2 data and rinex log files. This
comes in handy if you need to establish a remote base station.
  
  
  A proper antennae with a metal ground plane is
also critical to getting quality results.
  
  
  Observing under a forested canopy is difficult
especially in summer under leaf on conditions,  after a rain
which creates multiparth mayhem.
  
  
  There is a reason survey grade equipment is
relatively expensive. If you require repeatably accurate results
in a variety of conditions this is an option.
  
  
  Kirk Schmidt 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
Sent from my
  Galaxy
  
  
  
  
  
  
 Original message 
From: Jorge Gustavo Rocha  
Date: 2021-03-06 6:41 p.m. (GMT-04:00) 
To: qgis-user@lists.osgeo.org 
Subject: Re: [Qgis-user] Trimble GeoXT 2005 Accuracy 


  
  Hi,
  I just jump in this thread to say I'm really impressed with
Ardusimple. I have a RTK Handheld Surveyor Kit [1] for +- 400 €
and it works really well.
  I use the national NTRIP service and I have consistently
precisions around 10 cm with just one receiver. 
  
  I use a free Android 

Re: [Qgis-user] Trimble GeoXT 2005 Accuracy

[Springfield Harrison]

Hello All,

Thanks for the comments, I'll reply more fully tomorrow.

The receiver is Trimble mapping grade:

"The GeoExplorer 2005 series consists of:
• The GeoXH™ handheld, providing subfoot (30 cm) accuracy, or even 
8-inch (20 cm) accuracy

with the optional Zephyr™ antenna.
• The GeoXT™ handheld offering submeter accuracy for GIS data collection 
and data

maintenance.
• The GeoXM™ handheld with 1–3 meter GPS accuracy for mobile GIS 
applications."


"Post processed carrier accuracy: 1-30cm".  This receiver was probably 
$5-8000 (?) new.


 * Data collection was stationary, open sky, good satellite coverage,
   several minutes of 5 sec observations, good PDOP
 * SBAS and/or post processed

The concern is not the accuracy as such, but the systematic NW shift.  
This has been observed over several months, consistently. My old Trimble 
ProXR (1994?, $20K new!) is actually better in this regard than the GeoXT!


The Trimble manuals make no mention of the SBAS CRS, implying "turn it 
on and go, the receiver will integrate the SBAS into the rover file."


More tomorrow, thanks . . . . .

-
Cheers, Spring




On 06/Mar/2021 15:56, kirk wrote:

A few notes.

sbas which is waas in north America is based on equatorial satellites 
which will get you in the 1 m range in southern Canada.


you can achieve sub decimeter accuracy consistently using rtk ,either 
through a ntrip  caster (base station) broadcasting over the intenet 
or with your own base station and a radio link. there are a few chip 
sets and break out boards that you acquire and assemble your own 
system. This is a very inexpensive option.


Another option in Canada is to use precise point positioning (PPP) 
which requires 6 to 12 hours of observation data using L1, L2 or L1 
and L2 data and rinex log files. This comes in handy if you need to 
establish a remote base station.


A proper antennae with a metal ground plane is also critical to 
getting quality results.


Observing under a forested canopy is difficult especially in summer 
under leaf on conditions,  after a rain which creates multiparth mayhem.


There is a reason survey grade equipment is relatively expensive. If 
you require repeatably accurate results in a variety of conditions 
this is an option.


Kirk Schmidt







Sent from my Galaxy


 Original message 
From: Jorge Gustavo Rocha 
Date: 2021-03-06 6:41 p.m. (GMT-04:00)
To: qgis-user@lists.osgeo.org
Subject: Re: [Qgis-user] Trimble GeoXT 2005 Accuracy

Hi,

I just jump in this thread to say I'm really impressed with 
Ardusimple. I have a RTK Handheld Surveyor Kit [1] for +- 400 € and it 
works really well.


I use the national NTRIP service and I have consistently precisions 
around 10 cm with just one receiver.


I use a free Android application called SW Maps [2]. My survey points, 
tracks and photos are collect in a geopackage that I can read in QGIS. 
I use it mostly to collect ground control points for my drone flights.


Regards,

Jorge Gustavo

[1] https://www.ardusimple.com/product/rtk-handheld-surveyor-kit/

[2] https://play.google.com/store/apps/details?id=np.com.softwel.swmaps

Às 20:12 de 06/03/21, Greg Troxel escreveu:

Springfield Harrison  writes:


Thanks Dan.  See my relies to Kirk and Greg.  The Emlid sounds
interesting, will have a look.

I have an earlier Emlid Reach (not RS or RS2), which has L1 only, and I
never got it to work well.

Also look at the Ardusimple unit -- but it's more a parts kit than a
system.  You need a way to get RTK reference data in, and a good
antenna.  One approach is Vespucci (OSM editor for Android) as a
datalogger, and the Ardusimple WiFi NTRIP master to get corrections over
the phone's hotspot.

   https://www.ardusimple.com/product/simplertk2b/

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