Re: [Qgis-user] delimited text point cloud color attribute ?
fantastic, that did it, I was not aware of the color_rgb() functionnality in the Expression Builder. Thanks a lot. JM - Mail original - De: Chris Crook ccr...@linz.govt.nz À: frie...@free.fr, Qgis-user@lists.osgeo.org Envoyé: Dimanche 22 Juin 2014 10:04:57 Objet: RE: [Qgis-user] delimited text point cloud color attribute ? You can do this by using a data defined properties. Go in to layer properties Select the Style tab Pick a single symbol as the marker type In the bottom left of the dialog is the symbol layers panel. Click the Simple marker Then in the panel to the right click Data defined properties This will bring up the data defined properties dialog box Click the fill color check box, and then click the [...] button to the right of it (expression) This will get you into the Expression string builder Click on the Color group to expand it out, then enter the following in the Expression box color_rgb(R,G,B) Then click Ok as many times as necessary to get out .. this should do it. Sounds complicated, but makes more sense when you do it than when you try to write it down! CHeers Chris From: frie...@free.fr [frie...@free.fr] Sent: 21 June 2014 19:32 To: Qgis-user@lists.osgeo.org Subject: [Qgis-user] delimited text point cloud color attribute ? I am sure this is a trivial question by I am unable to locate the solution on the web after a couple of days of searching : I have a point cloud defined with coordinates and RGB color attributes, ie a file with XYZR G B 508.71444702 255.17164612 316.63302612 254 254 254 508.85519409 255.27404785 316.73541260 254 254 254 508.86724854 255.21253967 316.71292114 252 254 254 508.92807007 255.21278381 316.73757935 247 251 253 I can load this file using the Add Delimited Text Layer tool, and at the moment I use the Z elevation attribute to color my point cloud in QGis (Properties - Graduated in Symbol option and Column = Z). I would like now each point to be colored by the RGB attribute: how can I do this ? I know this is trivial for raster layers, but I cannot find the solution for a vector layer. Thanks, Jean-Michel This message contains information, which may be in confidence and may be subject to legal privilege. If you are not the intended recipient, you must not peruse, use, disseminate, distribute or copy this message. If you have received this message in error, please notify us immediately (Phone 0800 665 463 or i...@linz.govt.nz) and destroy the original message. LINZ accepts no responsibility for changes to this email, or for any attachments, after its transmission from LINZ. Thank You. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] delimited text point cloud color attribute ?
You can do this by using a data defined properties. Go in to layer properties Select the Style tab Pick a single symbol as the marker type In the bottom left of the dialog is the symbol layers panel. Click the Simple marker Then in the panel to the right click Data defined properties This will bring up the data defined properties dialog box Click the fill color check box, and then click the [...] button to the right of it (expression) This will get you into the Expression string builder Click on the Color group to expand it out, then enter the following in the Expression box color_rgb(R,G,B) Then click Ok as many times as necessary to get out .. this should do it. Sounds complicated, but makes more sense when you do it than when you try to write it down! CHeers Chris From: frie...@free.fr [frie...@free.fr] Sent: 21 June 2014 19:32 To: Qgis-user@lists.osgeo.org Subject: [Qgis-user] delimited text point cloud color attribute ? I am sure this is a trivial question by I am unable to locate the solution on the web after a couple of days of searching : I have a point cloud defined with coordinates and RGB color attributes, ie a file with XYZR G B 508.71444702 255.17164612 316.63302612 254 254 254 508.85519409 255.27404785 316.73541260 254 254 254 508.86724854 255.21253967 316.71292114 252 254 254 508.92807007 255.21278381 316.73757935 247 251 253 I can load this file using the Add Delimited Text Layer tool, and at the moment I use the Z elevation attribute to color my point cloud in QGis (Properties - Graduated in Symbol option and Column = Z). I would like now each point to be colored by the RGB attribute: how can I do this ? I know this is trivial for raster layers, but I cannot find the solution for a vector layer. Thanks, Jean-Michel This message contains information, which may be in confidence and may be subject to legal privilege. If you are not the intended recipient, you must not peruse, use, disseminate, distribute or copy this message. If you have received this message in error, please notify us immediately (Phone 0800 665 463 or i...@linz.govt.nz) and destroy the original message. LINZ accepts no responsibility for changes to this email, or for any attachments, after its transmission from LINZ. Thank You. ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Extract Projection Hangs
Thanks for the tips on using gdalsrsinfo Andre. I can confirm that the tifs do have a projection assigned (see output below), but that the extract projection tool still hangs when I attempt to create the world file: C:\Users\Rebecca\Desktopgdalsrsinfo C:\Users\Rebecca\Documents\DTM_MULTI-HS_D8_H25.tif PROJ.4 : '+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=40 +y_0=-1000 00 +datum=OSGB36 +units=m +no_defs ' OGC WKT : PROJCS[OSGB 1936 / British National Grid, GEOGCS[OSGB 1936, DATUM[OSGB_1936, SPHEROID[Airy 1830,6377563.396,299.324964644, AUTHORITY[EPSG,7001]], AUTHORITY[EPSG,6277]], PRIMEM[Greenwich,0], UNIT[degree,0.0174532925199433], AUTHORITY[EPSG,4277]], PROJECTION[Transverse_Mercator], PARAMETER[latitude_of_origin,49], PARAMETER[central_meridian,-2], PARAMETER[scale_factor,0.9996012717], PARAMETER[false_easting,40], PARAMETER[false_northing,-10], UNIT[metre,1, AUTHORITY[EPSG,9001]], AUTHORITY[EPSG,27700]] Does anyone have another way to create worldfiles from the embedded geotiff data? I suppose I could do this by hand for each file but ideally I'd like a neat solution for batch creation across a directory (like extract projection used to offer!). Many thanks, Rebecca ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] Extract Projection Hangs
You can use listgeo command in OSGEO shell: listgeo -tfw DTM_MULTI-HS_D8_H25.tif From: qgis-user-boun...@lists.osgeo.org [mailto:qgis-user-boun...@lists.osgeo.org] On Behalf Of Rebecca Bennett Sent: 22 June 2014 12:13 To: qgis-user@lists.osgeo.org Subject: Re: [Qgis-user] Extract Projection Hangs Thanks for the tips on using gdalsrsinfo Andre. I can confirm that the tifs do have a projection assigned (see output below), but that the extract projection tool still hangs when I attempt to create the world file: C:\Users\Rebecca\Desktopgdalsrsinfo C:\Users\Rebecca\Documents\DTM_MULTI-HS_D8_H25.tif PROJ.4 : '+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=40 +y_0=-1000 00 +datum=OSGB36 +units=m +no_defs ' OGC WKT : PROJCS[OSGB 1936 / British National Grid, GEOGCS[OSGB 1936, DATUM[OSGB_1936, SPHEROID[Airy 1830,6377563.396,299.324964644, AUTHORITY[EPSG,7001]], AUTHORITY[EPSG,6277]], PRIMEM[Greenwich,0], UNIT[degree,0.0174532925199433], AUTHORITY[EPSG,4277]], PROJECTION[Transverse_Mercator], PARAMETER[latitude_of_origin,49], PARAMETER[central_meridian,-2], PARAMETER[scale_factor,0.9996012717], PARAMETER[false_easting,40], PARAMETER[false_northing,-10], UNIT[metre,1, AUTHORITY[EPSG,9001]], AUTHORITY[EPSG,27700]] Does anyone have another way to create worldfiles from the embedded geotiff data? I suppose I could do this by hand for each file but ideally I'd like a neat solution for batch creation across a directory (like extract projection used to offer!). Many thanks, Rebecca -- This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited. Whilst reasonable care has been taken to avoid virus transmission, no responsibility for viruses is taken and it is your responsibility to carry out such checks as you feel appropriate. If this email contains a quote or offer to sell products, carry out work or perform services then our standard terms and conditions (which can be found at http://www.lutraconsulting.co.uk/downloads/Lutra%20Consulting%20Standard%20Terms%20and%20Conditions.pdf shall apply unless explicitly stated otherwise. Saber Razmjooei and Peter Wells trading as Lutra Consulting.___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
[Qgis-user] DEM in QGIS and ArcGIS
I have DEMs I got from USDA. In QGIS, the range of values for one of the DEMs is 112.661 to 158.197. In Arc, the same DEM has a range 109.206 to 178.305. Why is this? The CRS is the same for both, NAD83 UTM 15 N. I am using QGIS 2.2 and Arc 10.1. John ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
Re: [Qgis-user] DEM in QGIS and ArcGIS
AFAIK, qgis use by default the Load min/max values with cumulative count-cut 2% - 98% You should try to change to min/max (don't forget click on load. Regards, Andrea. 2014-06-22 21:19 GMT+02:00 john.polo jp...@mail.usf.edu: I have DEMs I got from USDA. In QGIS, the range of values for one of the DEMs is 112.661 to 158.197. In Arc, the same DEM has a range 109.206 to 178.305. Why is this? The CRS is the same for both, NAD83 UTM 15 N. I am using QGIS 2.2 and Arc 10.1. John ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user -- - Andrea Peri . . . . . . . . . qwerty àèìòù - ___ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user
