Re: [Qgis-user] Request for Guidance on Using 'Dissolve' Tool in QGIS with IUCN Data
Hi Marcello, you can choose which fields QGIS should use for the dissolve process. Only features that are homogeneous throughout the chosen fields will be dissolved into a new feature. Hope this helps Bernhard > Marcello Bilancioni via QGIS-User hat am > 26.06.2023 01:54 CEST geschrieben: > > > Good morning, > > I am currently working with the mammal species distribution data provided > by IUCN, and analyzing these shape files in QGIS. > > As part of my analysis, I have been using the 'Dissolve' tool in QGIS to > merge rows of the same species into a single entry. This operation is aimed > at creating a single comprehensive polygon that represents each species' > entire distribution range. However, while the tool successfully > consolidates the geometries, it looses important attribute data from the > original attribute table. In particular, this leads to the loss of valuable > information within the "Presence" and "Origin" columns, where the values > can differ across entries for the same species. > > Could you provide any recommendations on how to avoid such data loss? Is > there a strategy or method that could effectively summarize or retain this > varied information while processing the data using the 'Dissolve' tool? > > Furthermore, in my dataset, I have noticed some specific values under the > "Presence" and "Origin" columns: "presence 3", "presence 6", and "origin 5" > (I have attached a list with those species here). According to the IUCN > guidelines, these values need to be updated or adjusted. Do you happen to > know how to update these entries within QGIS best? > > Thank you in advance for any assistance you can provide. > > Best regards, > > Marcello Bilancioni > ___ > 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] Request for Guidance on Using 'Dissolve' Tool in QGIS with IUCN Data
Good morning, I am currently working with the mammal species distribution data provided by IUCN, and analyzing these shape files in QGIS. As part of my analysis, I have been using the 'Dissolve' tool in QGIS to merge rows of the same species into a single entry. This operation is aimed at creating a single comprehensive polygon that represents each species' entire distribution range. However, while the tool successfully consolidates the geometries, it looses important attribute data from the original attribute table. In particular, this leads to the loss of valuable information within the "Presence" and "Origin" columns, where the values can differ across entries for the same species. Could you provide any recommendations on how to avoid such data loss? Is there a strategy or method that could effectively summarize or retain this varied information while processing the data using the 'Dissolve' tool? Furthermore, in my dataset, I have noticed some specific values under the "Presence" and "Origin" columns: "presence 3", "presence 6", and "origin 5" (I have attached a list with those species here). According to the IUCN guidelines, these values need to be updated or adjusted. Do you happen to know how to update these entries within QGIS best? Thank you in advance for any assistance you can provide. Best regards, Marcello Bilancioni mammal_list.xlsx Description: MS-Excel 2007 spreadsheet ___ 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] Adding delimited text layer in QGIS using Geographical modeler- reg
Thanks a lot. On Sun, Jun 25, 2023 at 10:43 PM Ujaval Gandhi wrote: > You can use the “Create points layer from table” algorithm. > > On Sun, 25 Jun 2023 at 10:39 PM, Abhi Shek via QGIS-User < > qgis-user@lists.osgeo.org> wrote: > >> Hi, >> >> Can you please suggest me how to add a delimited text layer in QGIS using >> Geographical modeler. >> Thanks in advance. >> -- >> with warm regards, >> P S N Abhishek, >> >> ___ >> 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 >> > -- > --- > Ujaval Gandhi > Spatial Thoughts > www.spatialthoughts.com > > -- with warm regards, P S N Abhishek, ___ 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] Adding delimited text layer in QGIS using Geographical modeler- reg
You can use the “Create points layer from table” algorithm. On Sun, 25 Jun 2023 at 10:39 PM, Abhi Shek via QGIS-User < qgis-user@lists.osgeo.org> wrote: > Hi, > > Can you please suggest me how to add a delimited text layer in QGIS using > Geographical modeler. > Thanks in advance. > -- > with warm regards, > P S N Abhishek, > > ___ > 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 > -- --- Ujaval Gandhi Spatial Thoughts www.spatialthoughts.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
[Qgis-user] Adding delimited text layer in QGIS using Geographical modeler- reg
Hi, Can you please suggest me how to add a delimited text layer in QGIS using Geographical modeler. Thanks in advance. -- with warm regards, P S N Abhishek, ___ 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
