Re: [Qgis-user] Creating raster difference for many small rasters
Hi, Can you use the zonal statistics in the processing tools? It’s not the plugin. Nicolas Cadieux Ça va bien aller! > Le 17 avr. 2020 à 11:04, joolek a écrit : > > > Hi Everyone, > > I have failed looking for a solution. And using latest QGIS so can't use > Zonal Statistic Plugin > > I basically have almost a hundred of small asc grids, from two different data > sets. They overlap and I'd like to calculate difference between them... not > as a one value but difference for each overlapping raster. > > I also do have them vectorized. > > As mentioned I have tried Zonal Statistic Plugin but it doesn't work on new > QGIS. > > Does anyone have experience and could advise? > Masive thank you!! > ___ > 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] topology checker - Check if point features are covered by line features
Bug report has been made #35831 On 2020-04-17 12:58 p.m., Nicolas Cadieux wrote: Hi, Small correction, If you extract the end nodes (vertices) of the line, you can use the following rule. End node layer must be covered by endpoints of line layer or node layer must be covered by line. I therefore assume the QGIS topology checker can work for endnode only and not for "middle node" of the line. This is should be reported as a bug I think. Nicolas On 2020-04-17 12:42 p.m., Nicolas Cadieux wrote: Hi Marshal, I looked at your data. The first problem is that none or your line nodes intersect with a point. It looks close... but it's not close enough. By using "snap geometry location", I was able to create a new line that snaps to your point. (called Topologie snapped_line in the file I will send you in private). A "Select by location" or a "Join Attributes by location" confirms that the points now intersect the Topologie snapped line layer. The Join Attributes by location will permit you to find the problems as you can discard records that do not intersect. This will give you what you want. As for the topology Checker, it seems that a line cannot cover a point or a point cannot cover a line even if point and line nodes intersect (Can someone confirm this?). I can only assume that QGIS works with the correct assumption that a point and a line does not have a surface to cover and therefore, cannot cover anything. I assume, based on your observations that ESRI does not follow that assumption. You can however create a 1 m buffer around your line (Topologie Buffered_line in the file). Then, you can create the rule (polygon must contain point). That rule will work in the topology Checker. Cheers! Nicolas On 2020-04-13 10:25 a.m., Nicolas Cadieux wrote: Hi, I don’t have QGIS in front of me. I looked around on the the net and was surprised to see the «covered By » option for points and lines. Unless a line is snapped, or intersects a point exactly on a Line node, it’s just about impossible to calculate if a line « covers » a point. This is something easy to do with a polygon but not a line because of float point precision error. You could buffer the lines and see if that helps. You could create a 1m buffer on the line (or the point). Make sure both layers are in the same crs so that additional calculations don’t need to be done. You could at the « select by location » side. I would look at « snap with » or «intersects with »options. Nicolas Cadieux Ça va bien aller! Le 13 avr. 2020 à 06:11, Marshal Mappers a écrit : Hello everyone, I want to use the topology checker to check if point features are covered by line features. For example are the bus stops covered by the bus lines. Therefore I use the topology checker with the following rule: "points" must be covered by "lines". But I get the error for all points that "point is not covered by segment". I even get the error for points that I edited on the line with snapping. Here my questions: 1. Is it possible to check if point features are covered by line features? With topology checker? In general? 2. What does the rule: "points" must be covered by "lines"check? Under what cicumstances is a point feature covered by a line feature? I tried this in QGIS Versions 2.18.26; 3.4.15; 3.10.2 My OS ist Windows 10 I tried with shapefiles and geopackage layers The CBS of point and line layers are the same. Here I tried the coordinate systems with epgs: 31468 (DHDN / 3---degree Gauss-Kruger zone 4) and 25832 (ETRS89 / UTM zone 32N). If anyone could explain or point me to the right direction, that would be awesome. Thank you! Best regards Marshal ___ 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 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 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-it-user] Tabella attributi in CACHE
Salve, vi sottopongo questa situazione, per capire se é una cosa che si possa modificare "facilmente", o debba entrae in questione complesse del CORE di QGIS. Ho un file CSV, con piú di 1 milione di linee. Ad importarlo come punti, ed a usare la tabella attributi, ho notato velocitá in un processo, e lentitudine in un altro. Per curiositá, ho comparato con un altro software, e il risultato é il seguente: Importare il file: QGIS 13 secondi, ALTRO SW: 89 secondi. Aprire tabella attributi: QGIS 27 secondi, ALTRO SW: 1 secondo. come potete notare é abissale la differenza. QGIS importa super rapido il file (ma che in realtá é un'operazione singola, si fa solo la prima volta) mentre in apertura tabella va lento (ed é l'operazione che si ripete moltissimo in fase di lavoro). Vi chiedo, non esisterebbe la possibilitá di far caricare la tabella in una sorta di CACHE, cosí che dalla seconda volta in poi, aumentare le prestazioni? (parlo da non esperto) Grazie mille per i vostri commenti! Luca -- Sent from: http://osgeo-org.1560.x6.nabble.com/QGIS-Italian-User-f5250612.html ___ QGIS-it-user mailing list QGIS-it-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/qgis-it-user
Re: [Qgis-user] topology checker - Check if point features are covered by line features
Hi, Small correction, If you extract the end nodes (vertices) of the line, you can use the following rule. End node layer must be covered by endpoints of line layer or node layer must be covered by line. I therefore assume the QGIS topology checker can work for endnode only and not for "middle node" of the line. This is should be reported as a bug I think. Nicolas On 2020-04-17 12:42 p.m., Nicolas Cadieux wrote: Hi Marshal, I looked at your data. The first problem is that none or your line nodes intersect with a point. It looks close... but it's not close enough. By using "snap geometry location", I was able to create a new line that snaps to your point. (called Topologie snapped_line in the file I will send you in private). A "Select by location" or a "Join Attributes by location" confirms that the points now intersect the Topologie snapped line layer. The Join Attributes by location will permit you to find the problems as you can discard records that do not intersect. This will give you what you want. As for the topology Checker, it seems that a line cannot cover a point or a point cannot cover a line even if point and line nodes intersect (Can someone confirm this?). I can only assume that QGIS works with the correct assumption that a point and a line does not have a surface to cover and therefore, cannot cover anything. I assume, based on your observations that ESRI does not follow that assumption. You can however create a 1 m buffer around your line (Topologie Buffered_line in the file). Then, you can create the rule (polygon must contain point). That rule will work in the topology Checker. Cheers! Nicolas On 2020-04-13 10:25 a.m., Nicolas Cadieux wrote: Hi, I don’t have QGIS in front of me. I looked around on the the net and was surprised to see the «covered By » option for points and lines. Unless a line is snapped, or intersects a point exactly on a Line node, it’s just about impossible to calculate if a line « covers » a point. This is something easy to do with a polygon but not a line because of float point precision error. You could buffer the lines and see if that helps. You could create a 1m buffer on the line (or the point). Make sure both layers are in the same crs so that additional calculations don’t need to be done. You could at the « select by location » side. I would look at « snap with » or «intersects with »options. Nicolas Cadieux Ça va bien aller! Le 13 avr. 2020 à 06:11, Marshal Mappers a écrit : Hello everyone, I want to use the topology checker to check if point features are covered by line features. For example are the bus stops covered by the bus lines. Therefore I use the topology checker with the following rule: "points" must be covered by "lines". But I get the error for all points that "point is not covered by segment". I even get the error for points that I edited on the line with snapping. Here my questions: 1. Is it possible to check if point features are covered by line features? With topology checker? In general? 2. What does the rule: "points" must be covered by "lines"check? Under what cicumstances is a point feature covered by a line feature? I tried this in QGIS Versions 2.18.26; 3.4.15; 3.10.2 My OS ist Windows 10 I tried with shapefiles and geopackage layers The CBS of point and line layers are the same. Here I tried the coordinate systems with epgs: 31468 (DHDN / 3---degree Gauss-Kruger zone 4) and 25832 (ETRS89 / UTM zone 32N). If anyone could explain or point me to the right direction, that would be awesome. Thank you! Best regards Marshal ___ 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 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] geometry generator - unexpected results
Michel, Thank you for your response, and for putting some good geometry generator examples out for others to learn from. (If others on the list haven't seen them, they are at: https://gitlab.com/GIS-projects/qgis-geometry-generator-examples) Your suggestion worked for me. I am mapping in EPSG 26915 (UTM Z15N), and since both SRS are in meters, I thought that similar values would work. I had tried to change the params in the functions by an order of magnitude, but obviously needed to go farther. Thank you again for your help. David. On Fri, Apr 17, 2020 at 5:05 AM Michel Stuyts wrote: > The numbers you need to use in “rand(-10, 10), rand(-10, 10)” depend on the > CRS of your layer. I tested it with some demo data in EPSG:31370 and I got > a similar result as you. When I changed those numbers I got a better > result. After you changed those, you can play around with that 100 inside > the generate_series, to get the result you want. For me the following gave > a good result: > > > > make_line( > > array_foreach( > > generate_series( > > 0, length($geometry), 300 > > ), > > translate( > > line_interpolate_point($geometry, @element), > > rand(-0.5, 0.5), > > rand(-0.5, 0.5) > > ) > > ) > > ) > > > > > > Michel > > *Van:* Qgis-user *Namens *David > Fawcett > *Verzonden:* donderdag 16 april 2020 20:01 > *Aan:* qgis-user > *Onderwerp:* [Qgis-user] geometry generator - unexpected results > > > > I am trying to use a geometry generator to accomplish the "hand-drawn" > line style. > > > > Some great recent examples by: > > > > Klas Karlsson > > https://twitter.com/klaskarlsson/status/1249333750451879937 > > > > Hamish: > > https://polemic.nz/2019/11/18/foss4g-qgis-geometry-generators/ > > > > I am using the code below from the blog post by Hamish in QGIS 3.12: > > > > make_line( > > array_foreach( > > generate_series( > > 0, length($geometry), 100 > > ), > > translate( > > line_interpolate_point($geometry, @element), > > rand(-10, 10), > > rand(-10, 10) > > ) > > ) > > ) > > Here is an image of what the results look like: > https://github.com/fawcett/examples/blob/master/lines.png > > The line geometries are in blue, and the geometry generator output is in > black. > > Can anyone suggest what is going wrong? > > Thank you, > > David. > > > > > ___ > 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] topology checker - Check if point features are covered by line features
Hi Marshal, I looked at your data. The first problem is that none or your line nodes intersect with a point. It looks close... but it's not close enough. By using "snap geometry location", I was able to create a new line that snaps to your point. (called Topologie snapped_line in the file I will send you in private). A "Select by location" or a "Join Attributes by location" confirms that the points now intersect the Topologie snapped line layer. The Join Attributes by location will permit you to find the problems as you can discard records that do not intersect. This will give you what you want. As for the topology Checker, it seems that a line cannot cover a point or a point cannot cover a line even if point and line nodes intersect (Can someone confirm this?). I can only assume that QGIS works with the correct assumption that a point and a line does not have a surface to cover and therefore, cannot cover anything. I assume, based on your observations that ESRI does not follow that assumption. You can however create a 1 m buffer around your line (Topologie Buffered_line in the file). Then, you can create the rule (polygon must contain point). That rule will work in the topology Checker. Cheers! Nicolas On 2020-04-13 10:25 a.m., Nicolas Cadieux wrote: Hi, I don’t have QGIS in front of me. I looked around on the the net and was surprised to see the «covered By » option for points and lines. Unless a line is snapped, or intersects a point exactly on a Line node, it’s just about impossible to calculate if a line « covers » a point. This is something easy to do with a polygon but not a line because of float point precision error. You could buffer the lines and see if that helps. You could create a 1m buffer on the line (or the point). Make sure both layers are in the same crs so that additional calculations don’t need to be done. You could at the « select by location » side. I would look at « snap with » or «intersects with »options. Nicolas Cadieux Ça va bien aller! Le 13 avr. 2020 à 06:11, Marshal Mappers a écrit : Hello everyone, I want to use the topology checker to check if point features are covered by line features. For example are the bus stops covered by the bus lines. Therefore I use the topology checker with the following rule: "points" must be covered by "lines". But I get the error for all points that "point is not covered by segment". I even get the error for points that I edited on the line with snapping. Here my questions: 1. Is it possible to check if point features are covered by line features? With topology checker? In general? 2. What does the rule: "points" must be covered by "lines"check? Under what cicumstances is a point feature covered by a line feature? I tried this in QGIS Versions 2.18.26; 3.4.15; 3.10.2 My OS ist Windows 10 I tried with shapefiles and geopackage layers The CBS of point and line layers are the same. Here I tried the coordinate systems with epgs: 31468 (DHDN / 3---degree Gauss-Kruger zone 4) and 25832 (ETRS89 / UTM zone 32N). If anyone could explain or point me to the right direction, that would be awesome. Thank you! Best regards Marshal ___ 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 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] Creating raster difference for many small rasters
Hi Everyone, I have failed looking for a solution. And using latest QGIS so can't use Zonal Statistic Plugin I basically have almost a hundred of small asc grids, from two different data sets. They overlap and I'd like to calculate difference between them... not as a one value but difference for each overlapping raster. I also do have them vectorized. As mentioned I have tried Zonal Statistic Plugin but it doesn't work on new QGIS. Does anyone have experience and could advise? Masive thank you!! ___ 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] QGIS pyqt5 missing QString
Grazie a tutti per il suggerimento. La mia é stata una svista, in realtà avete ragione. Sto provando a replicare un codice per poter fare un override di un drop event tra una listwidget e una tablewidget splittando i nomi dei file che seleziono e sposto e sto avendo parecchie difficoltà. Spero di riuscirci Enzo Il ven 17 apr 2020, 16:06 matteo ha scritto: > Ciao Enzo, > > perché non usare una normale stringa di python? Hai qualche vantaggio > specifico con una QString? > > Matteo > ___ > QGIS-it-user mailing list > QGIS-it-user@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/qgis-it-user > ___ QGIS-it-user mailing list QGIS-it-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/qgis-it-user
Re: [QGIS-it-user] QGIS pyqt5 missing QString
Ciao Enzo, perché non usare una normale stringa di python? Hai qualche vantaggio specifico con una QString? Matteo ___ QGIS-it-user mailing list QGIS-it-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/qgis-it-user
[Qgis-user] New Online Training Course: An Introduction To Integrating QGIS/GIS And R For Spatial Analysis - 6th to 8th May 2020
We will be running a new online training course called 'An Introduction To Integrating QGIS/GIS and R For Spatial Analysis' between the 6th and 8th of May 2020. It will be held via the Zoom video-conferencing platform. This course is aimed at those who wish to learn how to use and integrate QGIS (the leading freely available GIS software package) and R (the leading freely available data analysis software package) for spatial analysis. It will be taught by Dr. Colin D. MacLeod, the author of 'An Introduction To Integrating QGIS And R for Spatial Analysis [1]' (Pictish Beast Publications) and a renowned expert in using GIS in biological and ecological research. He is also a co-author of the recenntly publised 'An Introduction To Basic Statistics For Biologists Using R [2]', which is a practical guide to carrying out the analysis of biological data in R. The course assumes no prior knowledge of either QGIS/GIS or R, and so is open to complete beginners as well as those how know how to use one of these software packages, and wish to learn how to integrate it with the other. Attendance will be limited to a maximum of 16 people. The course for this three day course will cost GBP 395 per person (with a discounted rate of GBP 300 for students, the unwaged and those working for registered charities). To book a place, or for more information, visit http://gisinecology.com/online-course-an-introduction-to-integrating-qgis-gis-and-r-for-spatial-analysis/ or email i...@gisinecology.com. GIS and statistical analysis are two of the most fundamental software tools for modern biologists wishing to conduct spatial analyses. However, each have their own sets of software packages, and sometimes it can be difficult to know how to integrate the two. This course will provide an introduction to the integration of QGIS (the leading freely available GIS software package) and R (the leading data analysis software packages used by biologists) to create a combined tool set that makes the most of the strengths of each of these individual software packages. It will consist of a series of background sessions on using GIS and R for spatial analysis, mixed in with practical sessions where you will learn how to use QGIS, how to use R, and how to integrate two to complete a spatial analysis project. This last part will include working through an example project, starting with creating a high quality map for publication through creating raster data layers of environmental variables, joining data together based on their spatial relationships and analysing the combined data set using R (including creating summary statistics, conducting linear regressions and conducting generalised additive modelling - GAMs). While it will primarily be based around QGIS, this course is taught using software-independent approach, and it is also open to those who wish to learn how to use ArcGIS to do biological GIS. When you attend this course you will receive a free copy of An Introduction To Integrating QGIS And R for Spatial Analysis [1] (GIS For Biologists Workbooks) as the practical exercises in that course are based on the ones contained in that book. NOTE: If you wish to use ArcGIS software for this course, alternative materials will be provided for the practical sessions. == GIS IN ECOLOGY - Providing Training, Advice And Consultancy On The Use Of GIS In Ecology Web: www.GISinEcology.com Email: i...@gisinecology.com Need to ask a question about using GIS? Try the GIS In Ecology Forum: www.GISinEcology.com/GIS_in_Ecology_forum.htm Books From GIS In Ecology Staff: GIS For Biologists: A Practical Introduction For Undergraduates; RRP: £24.99 An Introduction To Using GIS In Marine Biology; RRP: £44.99 An Introduction To Using GIS In Marine Biology: Supplementary Workbook One - Creating Maps Of Species Distribution; RRP: £19:99 If you wish to purchase these books, visit: http://www.gisinecology.com/Book_Shop.htm To help the environment, please do not print out this email unless it is unavoidable. == Links: -- [1] http://gisinecology.com/an-introduction-to-integrating-qgis-and-r-for-spatial-analysis-gis-for-biologists-workbooks-series/ [2] http://gisinecology.com/stats-for-biologists-1___ 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] MSSQL connection problem
Hi all,
I have a problem with a MSSql connection.
My enviromnents:
So: Ubuntu 18.04
QGIS: 3.10.4
Installed msodbcsql17 from microsoft repository.
with a /etc/odbcinit.ini:
[SQL Server] Description=Microsoft ODBC Driver 17 for SQL Server
Driver=/opt/microsoft/msodbcsql17/lib64/libmsodbcsql-17.5.so.2.1
UsageCount=1
But when I try to do a connection I get a 'Driver not loaded Driver not
loaded'.
My connection data:
Connection name:
Provider/DNS: driver={SQL
Server};server=;port=1433;database=
Host:
Username:
Password:
Where I'm in wrong?
Thanks in advance.
Walter
--
Walter Lorenzetti phD email: lorenze...@gis3w.it skype: aiki74
twitter:w_lorenzetti g+:aiki74
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Re: [QGIS-it-user] QGIS pyqt5 missing QString
enzo.cocca wrote > In my plug in I would use the class QString but apparently seems to be > missing. Ciao Enzo, probabilmente volevi inviare il messaggio alla ML qgis-user e non a qgis-it-user. Comunque, in PyQt5 la classe QString non è più supportata e non è più necessaria. Basta usare gli equivalenti metodi delle stringhe di Python. Per maggiori info https://groups.google.com/forum/#!topic/vfx-platform-discuss/kHdwrBh_35U (QString and QStringList) o https://gis.stackexchange.com/questions/313949/name-qstring-is-not-defined A presto. Andrea -- Sent from: http://osgeo-org.1560.x6.nabble.com/QGIS-Italian-User-f5250612.html ___ QGIS-it-user mailing list QGIS-it-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/qgis-it-user
Re: [Qgis-user] geometry generator - unexpected results
The numbers you need to use in “rand(-10, 10), rand(-10, 10)” depend on the CRS of your layer. I tested it with some demo data in EPSG:31370 and I got a similar result as you. When I changed those numbers I got a better result. After you changed those, you can play around with that 100 inside the generate_series, to get the result you want. For me the following gave a good result: make_line( array_foreach( generate_series( 0, length($geometry), 300 ), translate( line_interpolate_point($geometry, @element), rand(-0.5, 0.5), rand(-0.5, 0.5) ) ) ) Michel Van: Qgis-user Namens David Fawcett Verzonden: donderdag 16 april 2020 20:01 Aan: qgis-user Onderwerp: [Qgis-user] geometry generator - unexpected results I am trying to use a geometry generator to accomplish the "hand-drawn" line style. Some great recent examples by: Klas Karlsson https://twitter.com/klaskarlsson/status/1249333750451879937 Hamish: https://polemic.nz/2019/11/18/foss4g-qgis-geometry-generators/ I am using the code below from the blog post by Hamish in QGIS 3.12: make_line( array_foreach( generate_series( 0, length($geometry), 100 ), translate( line_interpolate_point($geometry, @element), rand(-10, 10), rand(-10, 10) ) ) ) Here is an image of what the results look like: https://github.com/fawcett/examples/blob/master/lines.png The line geometries are in blue, and the geometry generator output is in black. Can anyone suggest what is going wrong? Thank you, David. ___ 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-it-user] QGIS pyqt5 missing QString
Hi all, In my plug in I would use the class QString but apparently seems to be missing. I found in internet a similar proble but with PyQt4. https://www.howtobuildsoftware.com/index.php/how-do/U4x/pyqt-pyqt4-qstring-attributeerror-qgis-qgis-pyqt4-missing-qstring-class Do you have some suggestion to resolve this? Thanks Enzo -- Enzo Cocca PhD in "Science and Technology for Archaeology and Cultural Heritage" ISMEO International Association of Mediterranean and Oriental Studies mail: enzo@gmail.com cell: +393495087014 ___ QGIS-it-user mailing list QGIS-it-user@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/qgis-it-user
