Re: [Qgis-user] Do GPX files contain CRS information?
Many many thanks to Nicolas Cadieux for that research! -- Garth Fletcher ___ 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
Re: [Qgis-user] Do GPX files contain CRS information?
Since GPX (and KML) always use WGS84, I’ve been meaning to put in a feature request for QGIS to automatically select this when exporting to those formats. Currently it’s quite an unfriendly experience to export to these formats from QGIS as there are lots of options, many of which (like choosing an unsuitable CRS) will give you a file that really doesn’t work. It does look like someone else already did this 7 years ago and it is on the “nice to have list” https://github.com/qgis/QGIS/issues/17081 Michael Dufty ___ 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
Re: [Qgis-user] Selecting profiles
Hi Ed, The only way I think of is by creating a shortcut that launches QGIS using the command line tools. Using this, you can specify which profile to use and which project: https://docs.qgis.org/3.16/en/docs/user_manual/introduction/qgis_configuration.html#command-line-and-environment-variables Best regards, Alexandre Neto QGIS Support www.cooperative.net On Wed, Mar 17, 2021 at 10:44 PM Ed Hawkins wrote: > I have created 4 profiles a reader qith no editing capabilities and 3 > editors. I want to force someone opening a project to select a > user profile. Is that possible and if so how? > Ed Hawkins > Henderso County E911 > > ___ > 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 > ___ 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
Re: [Qgis-user] Do GPX files contain CRS information?
Thank you very much for this research. I am surprised that we have not met in that rabbit hole. I first got interested in this when trying to see how close I could match the coordinates obtained with an hour of data collection using my SXblue II L1 GNSS WAAS unit to a USGS monument on a nearby mountain top. With guidance from a USGS specialist on datum and epoch conversion, the result was about 5.5 inches which I was very happy with for my purposes. That was in 2017. In 2020, having plenty of time to obsess over unimportant things, I fell back in that same rabbit hole as I had more reason to correctly set the CRS on WAAS coordinates. I will read your references to try to figure out whether WAAS is ITRF2008 or 2014. But since the difference is millimeters, it is not really important. My hope is to have a good CRS defined for SBAS in QGIS and that null transforms are not used between CRS which are "just" a meter different. When I save WAAS data as ITRF2008 (I can't remember which EPSG), QGIS 3.16 thinks the datum is invalid. 2014 seems to be OK. Stewart On Wed, Mar 17, 2021 at 6:14 PM Nicolas Cadieux wrote: > Hi, > > This last question brought me down a rabbit hole that took me a while to > find (at least partially). Of course, this is far away from the original > question of "Do GPX files contain CRS information?". The answer to that > was no. The datum is WGS84 (in it's most current iteration, or > WGS84(G1762). Transformation parameters to and from ITRF have been > published and can be found > >- > > https://confluence.qps.nl/qinsy/latest/en/world-geodetic-system-1984-wgs84-182618391.html#id-.WorldGeodeticSystem1984(WGS84)v9.1-WGS84realizations >- This file contain multiple transformations with sources > > https://confluence.qps.nl/qinsy/files/latest/en/182618383/182618384/1/1579182881000/ITRF_Transformation_Parameters.xlsx >- This contains info on WGS84 and NAD83 >https://mcraymer.github.io/geodesy/pubs/nad83_agu2007spr.pdf >- https://www.unoosa.org/documents/pdf/icg/2018/icg13/wgd/wgd_12.pdf > > Other question that were raised: What are the other reference frames used > by the various GNSS services: > >- https://www.sciencedirect.com/science/article/pii/S0273117720308292#! > - "The TRFs realized by the GPS, GLONASS, Galileo, and BeiDou-2 and > BeiDou-3 broadcast ephemerides are the orbital realizations of WGS 84 > (G1762′), PZ90.11, GTRF19v01, and BDCS respectively." > - More info here. > https://gssc.esa.int/navipedia/index.php/Reference_Frames_in_GNSS > > This document made a comparison comparison between broadcast reference > frames and ITRF: > >- > > http://www.epncb.eu/_newseventslinks/workshops/EPNLACWS_2017/pdf/06_Open_Session/04_Broadcast-Precise.pdf > - "Reference frames: > •GPS and Galileo broadcast reference frames are aligned with ITRF: > translations are less than 0.10 m and rotations are less than 2 > milli-second of arc > •GLONASS M broadcast reference frame is offset to ITRF by at most > 0.27 ±0.04 m in Y and maximum rotation is 4 ±2 milli-second of arc > about Y. > •GLONASS K broadcast reference frame is offset to ITRF by at most > 1.06 ±0.17 m in Y and maximum rotation is 19 ±2 milli-second of arc > about > X. > •BeiDoubroadcast reference frame is offset to ITRF by at most 0.26 > ±0.18 in X and Y, and maximum rotation is 2 ±1 milli-second of arc > about Z." > > Then there are questions pertaining to SBAS around the world: > >- > > https://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/library/factsheets/media/SBAS_Worldwide_QFact.pdf > - It state the various services > - Wide Area Augmentation System (WAAS) > - European Geostationary Navigation Overlay Service (EGNOS) > - Multi-functional Transport Satellite (MTSAT) Satellite Based > Augmentation System (MSAS) (Japan) > - GPS Aided Geostationary Earth Orbit (GEO) Augmented Navigation > (GAGAN) (India) > - System of Differential Correction and Monitoring (SDCM) Russia > - Korean Augmentation Satellite System (KASS) > - BeiDou Satellite Based Augmentation System (BDSBAS) > - Also found this >https://www.gps.gov/technical/ps/2008-WAAS-performance-standard.pdf >- And this https://www.nstb.tc.faa.gov/ > > Finally, there was the question of the introduction of new reference > frames when a SBAS services was used. I was skeptical of this but you guys > are right. Using a WAAS service does introduce a new reference frame as > the "... GEO satellites do not belong to any satellite positioning service > (e.g. GPS, GLONASS), ephemeris for those satellites are not externally > available. Therefore, it is the SBAS that is in charge of providing the > user with the GEO ephemeris. Keep in mind that all components are expressed > in ECEF reference
Re: [Qgis-user] Do GPX files contain CRS information?
Thanks for the research Nicolas. I think I will save this for a rainy day or when an issue comes up.Kirk SchmidtSent from my Galaxy Original message From: Nicolas Cadieux Date: 2021-03-17 7:14 p.m. (GMT-04:00) To: Greg Troxel , stewartbh...@gmail.com Cc: qgis-user Subject: Re: [Qgis-user] Do GPX files contain CRS information? Hi, This last question brought me down a rabbit hole that took me a while to find (at least partially). Of course, this is far away from the original question of "Do GPX files contain CRS information?". The answer to that was no. The datum is WGS84 (in it's most current iteration, or WGS84(G1762). Transformation parameters to and from ITRF have been published and can be found https://confluence.qps.nl/qinsy/latest/en/world-geodetic-system-1984-wgs84-182618391.html#id-.WorldGeodeticSystem1984(WGS84)v9.1-WGS84realizations This file contain multiple transformations with sources https://confluence.qps.nl/qinsy/files/latest/en/182618383/182618384/1/1579182881000/ITRF_Transformation_Parameters.xlsx This contains info on WGS84 and NAD83 https://mcraymer.github.io/geodesy/pubs/nad83_agu2007spr.pdf https://www.unoosa.org/documents/pdf/icg/2018/icg13/wgd/wgd_12.pdf Other question that were raised: What are the other reference frames used by the various GNSS services: https://www.sciencedirect.com/science/article/pii/S0273117720308292#! "The TRFs realized by the GPS, GLONASS, Galileo, and BeiDou-2 and BeiDou-3 broadcast ephemerides are the orbital realizations of WGS 84 (G1762′), PZ90.11, GTRF19v01, and BDCS respectively." More info here. https://gssc.esa.int/navipedia/index.php/Reference_Frames_in_GNSS This document made a comparison comparison between broadcast reference frames and ITRF: http://www.epncb.eu/_newseventslinks/workshops/EPNLACWS_2017/pdf/06_Open_Session/04_Broadcast-Precise.pdf "Reference frames: •GPS and Galileo broadcast reference frames are aligned with ITRF: translations are less than 0.10 m and rotations are less than 2 milli-second of arc •GLONASS M broadcast reference frame is offset to ITRF by at most 0.27 ±0.04 m in Y and maximum rotation is 4 ±2 milli-second of arc about Y. •GLONASS K broadcast reference frame is offset to ITRF by at most 1.06 ±0.17 m in Y and maximum rotation is 19 ±2 milli-second of arc about X. •BeiDoubroadcast reference frame is offset to ITRF by at most 0.26 ±0.18 in X and Y, and maximum rotation is 2 ±1 milli-second of arc about Z." Then there are questions pertaining to SBAS around the world: https://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/library/factsheets/media/SBAS_Worldwide_QFact.pdf It state the various services Wide Area Augmentation System (WAAS) European Geostationary Navigation Overlay Service (EGNOS) Multi-functional Transport Satellite (MTSAT) Satellite Based Augmentation System (MSAS) (Japan) GPS Aided Geostationary Earth Orbit (GEO) Augmented Navigation (GAGAN) (India) System of Differential Correction and Monitoring (SDCM) Russia Korean Augmentation Satellite System (KASS) BeiDou Satellite Based Augmentation System (BDSBAS) Also found this https://www.gps.gov/technical/ps/2008-WAAS-performance-standard.pdf And this https://www.nstb.tc.faa.gov/ Finally, there was the question of the introduction of new reference frames when a SBAS services was used. I was skeptical of this but you guys are right. Using a WAAS service does introduce a new reference frame as the "... GEO satellites do not belong to any satellite positioning service (e.g. GPS, GLONASS), ephemeris for those satellites are not externally available. Therefore, it is the SBAS that is in charge of providing the user with the GEO ephemeris. Keep in mind that all components are expressed in ECEF reference coordinates and the time offset is with respect to SBAS Network time (SNT)." (https://gssc.esa.int/navipedia/index.php/The_EGNOS_SBAS_Message_Format_Explained#SBAS_broadcast_data) Same information is stated here (https://www.sciencedirect.com/science/article/pii/S0273117720308292#!) "Also, note that the methodology and results reported here are only valid for direct, real-time unaugmented GNSS applications. Any form of augmentation including all types of differential positioning, Assisted GPS, or specialized augmentation, such as the US
[Qgis-user] Selecting profiles
I have created 4 profiles a reader qith no editing capabilities and 3 editors. I want to force someone opening a project to select a user profile. Is that possible and if so how? Ed Hawkins Henderso County E911 ___ 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
Re: [Qgis-user] Do GPX files contain CRS information?
Hi, This last question brought me down a rabbit hole that took me a while to find (at least partially). Of course, this is far away from the original question of "Do GPX files contain CRS information?". The answer to that was no. The datum is WGS84 (in it's most current iteration, or WGS84(G1762). Transformation parameters to and from ITRF have been published and can be found * https://confluence.qps.nl/qinsy/latest/en/world-geodetic-system-1984-wgs84-182618391.html#id-.WorldGeodeticSystem1984(WGS84)v9.1-WGS84realizations * This file contain multiple transformations with sources https://confluence.qps.nl/qinsy/files/latest/en/182618383/182618384/1/1579182881000/ITRF_Transformation_Parameters.xlsx * This contains info on WGS84 and NAD83 https://mcraymer.github.io/geodesy/pubs/nad83_agu2007spr.pdf * https://www.unoosa.org/documents/pdf/icg/2018/icg13/wgd/wgd_12.pdf Other question that were raised: What are the other reference frames used by the various GNSS services: * https://www.sciencedirect.com/science/article/pii/S0273117720308292#! o "The TRFs realized by the GPS, GLONASS, Galileo, and BeiDou-2 and BeiDou-3 broadcast ephemerides are the orbital realizations of WGS 84 (G1762′), PZ90.11, GTRF19v01, and BDCS respectively." o More info here. https://gssc.esa.int/navipedia/index.php/Reference_Frames_in_GNSS This document made a comparison comparison between broadcast reference frames and ITRF: * http://www.epncb.eu/_newseventslinks/workshops/EPNLACWS_2017/pdf/06_Open_Session/04_Broadcast-Precise.pdf o "Reference frames: •GPS and Galileo broadcast reference frames are aligned with ITRF: translations are less than 0.10 m and rotations are less than 2 milli-second of arc •GLONASS M broadcast reference frame is offset to ITRF by at most 0.27 ±0.04 m in Y and maximum rotation is 4 ±2 milli-second of arc about Y. •GLONASS K broadcast reference frame is offset to ITRF by at most 1.06 ±0.17 m in Y and maximum rotation is 19 ±2 milli-second of arc about X. •BeiDoubroadcast reference frame is offset to ITRF by at most 0.26 ±0.18 in X and Y, and maximum rotation is 2 ±1 milli-second of arc about Z." Then there are questions pertaining to SBAS around the world: * https://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/library/factsheets/media/SBAS_Worldwide_QFact.pdf o It state the various services + Wide Area Augmentation System (WAAS) + European Geostationary Navigation Overlay Service (EGNOS) + Multi-functional Transport Satellite (MTSAT) Satellite Based Augmentation System (MSAS) (Japan) + GPS Aided Geostationary Earth Orbit (GEO) Augmented Navigation (GAGAN) (India) + System of Differential Correction and Monitoring (SDCM) Russia + Korean Augmentation Satellite System (KASS) + BeiDou Satellite Based Augmentation System (BDSBAS) * Also found this https://www.gps.gov/technical/ps/2008-WAAS-performance-standard.pdf * And this https://www.nstb.tc.faa.gov/ Finally, there was the question of the introduction of new reference frames when a SBAS services was used. I was skeptical of this but you guys are right. Using a WAAS service does introduce a new reference frame as the "... GEO satellites do not belong to any satellite positioning service (e.g. GPS, GLONASS), ephemeris for those satellites are not externally available. Therefore, it is the SBAS that is in charge of providing the user with the GEO ephemeris. Keep in mind that all components are expressed in ECEF reference coordinates and the time offset is with respect to SBAS Network time (SNT)." (https://gssc.esa.int/navipedia/index.php/The_EGNOS_SBAS_Message_Format_Explained#SBAS_broadcast_data) Same information is stated here (https://www.sciencedirect.com/science/article/pii/S0273117720308292#!) * "Also, note that the methodology and results reported here are only valid for direct, real-time unaugmented GNSS applications. Any form of augmentation including all types of differential positioning, Assisted GPS, or specialized augmentation, such as the US Federal Aviation Administration (FAA’s) Wide Area Augmentation System, immediately introduce an alternate TRF with its own relationship to ITRF2014." And here (https://gssc.esa.int/navipedia/index.php/The_EGNOS_SBAS_Message_Format_Explained#SBAS_broadcast_data) * "Message type 9 Message type 9 contains the information about the GEO navigation. As GEO satellites do not belong to any satellite positioning service (e.g. GPS, GLONASS), ephemeris for those satellites are not externally available. Therefore, it is the SBAS that is in charge of providing the user with the GEO ephemeris. Keep in mind that all components are expressed in ECEF reference
Re: [Qgis-user] Which older version to use on my older Mac
Dan, I am not sure whether OS/QGIS VER should actually matter, but since you are running on OSX El Capitan (10.11.6) you might want to at least try to download 2.18.25-1, since it is a stable LTR version. Versions are reasonably close to each other with less then two years between releases of both instantiations. Raymond Verstuurd vanaf mijn iPhone > Op 17 mrt. 2021 om 19:28 heeft Dan Pratt het volgende > geschreven: > > > I need to download and use QGIS to do an introductory project for a class I > am taking at the University of Aberdeen. I have a 2008 MacBook Pro that can't > handle any operating system later than 10.11.6. I found the archive page with > a long list of older versions of the QGIS packages available, but there is no > information listed for what the System's requirements are for each of them. > What is the latest version of the software that I can run on my system? > Thanks, > Dan > ___ > 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 ___ 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
[Qgis-user] Which older version to use on my older Mac
I need to download and use QGIS to do an introductory project for a class I am taking at the University of Aberdeen. I have a 2008 MacBook Pro that can't handle any operating system later than 10.11.6. I found the archive page with a long list of older versions of the QGIS packages available, but there is no information listed for what the System's requirements are for each of them. What is the latest version of the software that I can run on my system? Thanks, Dan ___ 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
Re: [QGIS-it-user] aspetto qgis
Strano, i profili dovrebbero essere ereditari. Il 17 marzo 2021 11:21:18 CET, Daniele Bonaposta ha scritto: >Ciao a tutti, >sono passato da poco alla 3.16, vorrei ripristinare i pannelli come li >avevo nella precedente versione in modo permanente, senza che ad ogni >riavvio di QGIS li ritrovo come di default. >Non ricordo come si fa a salvare o rendere permanente la configurazione >dei >pannelli. Ho cercato e l'unica cosa che ho trovato è quella di salvare >un >file .ini, ma a quanto ricordo con la 3.10 non avevo fatto così. > >Grazie e saluti, >Daniele > > > > >-- >_ > > Daniele Bonaposta > GIS analyst > cartografia > >via Martiri della Bettola 55/4 >42123 - Reggio Emilia >mobile: +39.338.3377044 >e-mail: daniele.bonapo...@gmail.com > >*Linkedin*: http://www.linkedin.com/pub/daniele-bonaposta/26/487/872 >*Instagram*: https://www.instagram.com/blue_gis/?hl=it >__ -- Sorry for being short___ QGIS-it-user mailing list QGIS-it-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/qgis-it-user
[QGIS-it-user] aspetto qgis
Ciao a tutti, sono passato da poco alla 3.16, vorrei ripristinare i pannelli come li avevo nella precedente versione in modo permanente, senza che ad ogni riavvio di QGIS li ritrovo come di default. Non ricordo come si fa a salvare o rendere permanente la configurazione dei pannelli. Ho cercato e l'unica cosa che ho trovato è quella di salvare un file .ini, ma a quanto ricordo con la 3.10 non avevo fatto così. Grazie e saluti, Daniele -- _ Daniele Bonaposta GIS analyst cartografia via Martiri della Bettola 55/4 42123 - Reggio Emilia mobile: +39.338.3377044 e-mail: daniele.bonapo...@gmail.com *Linkedin*: http://www.linkedin.com/pub/daniele-bonaposta/26/487/872 *Instagram*: https://www.instagram.com/blue_gis/?hl=it __ ___ QGIS-it-user mailing list QGIS-it-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/qgis-it-user
Re: [Qgis-user] Learning resources/books for QGIS
For YouTube, check klas karlsson and Hans van der kwas channels https://youtube.com/c/KlasKarlsson https://youtube.com/c/HansvanderKwast Safe bets! Alexandre Neto A quarta, 17/03/2021, 02:47, Roderick Anderson escreveu: > Thank you to Kirk and Alexandre for the suggestions. > > Book wise: I had been looking at "QGIS Map Design" and I think Kurk > Menke's "QGIS 3" > > I'll have to make another pass at the YouTube offerings. I don't use > YouTube often so it will be "New adventures in learning." :-) > > > Thanks, > Rod > -- > On 3/12/21 9:39 AM, Roderick Anderson wrote: > > Good day. > > > > I looking for some suggestions of books on learning QGIS. > > > > I have some background (very long ago - late 80's / early 90's) with GIS > > but at that time is was more about mapping not analysis. > > > > In fact, I am looking to use QGIS for building maps for personal use. > > Something along the lines of the Washington state (US) "Map Your > > Neighborhood" project. The ability to easily load personal data is > > important. > > > > For me the QGIS Documentation assumes a more current knowledge of the > > technology and terminology than I have. > > > > I've looked at the QGIS book selections but not quite sure which would > > the best for my needs. > > > > Any and all suggestions are welcome. > > > > > > TIA, > > Rod > ___ > 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 > ___ 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
