Chris and list It is working for me now.
Sorry, when I said lat/long I had meant the points were imported as Lat/Long EPSG:4326 from a text file. But subsequently projected to 3857. Example point in the project CRS ( EPSG:3857) -11923424,5461258 So I think I found the problem. Seems one workflow works and the other doesn't. You must select the Attribute Field from the field list and then edit the expression. This works. I thought I had tried it yesterday but suspect I didn't have the expression right. What I spent time with was using the Assistant dialog. That did not work. I was able to reproduce that it does not work. So the workflow that works is select the attribute Field and then go to Edit the Expression. I was unable to get it working using the Assistant dialog. thanks for the great help! Peter On Thu, Dec 16, 2021 at 2:50 PM chris hermansen <clherman...@gmail.com> wrote: > Peter and list > > On Thu, Dec 16, 2021 at 7:08 AM Peter Devanney <pe...@devanney.ca> wrote: > >> Chris >> >> The buffer input is a point the lat and long are Doubles. The buffer >> distance variable is a Double. Using EPSG 3857 for all. >> > > I just created a point shapefile in EPSG:3857, added a field called > "bufferdist", added three points with bufferdist set to 1000, 2000 and 5000 > respectively. > > EPSG:3857 is in metres, are readily visible and as far as I can tell from > measuring the buffers were correctly created in the correct size. > > In the buffer dialogue did you click on the button next to the distance / > units pair and next to "field type >" select your field, which would > deactivate the distance / units pair? > > Your mention of "lat and long" troubles me. EPSG:3857 is a projected > coordinate system, not a lat/lon system. > >> >> Not sure what the protocol on the list is or if it will accept a small 2 >> MB .mp4 but I can show what I am doing for workflow if that might help? >> >> thanks Chris >> >> Peter >> >> On Wed, Dec 15, 2021 at 6:42 PM chris hermansen <clherman...@gmail.com> >> wrote: >> >>> Peter and list, >>> >>> On Wed, Dec 15, 2021 at 7:26 AM Peter Devanney <pe...@devanney.ca> >>> wrote: >>> >>>> Hi Folks >>>> >>>> Have a table full of points that I want to buffer by a variable >>>> distance. The distance is an attribute in the input table in km. >>>> >>>> Using Vector>Geoprocessing>Buffer It works fine if I specify a fixed >>>> buffer. >>>> >>>> When I run it with the attribute selected it runs fine but it will not >>>> paint the buffers. At first I thought I had a unit issue so added an >>>> expression to multiply the attribute by 1000 to get to km from m as I >>>> wasn't sure if the default was m. >>>> >>>> The buffered output behaves totally normally so I can label, and zoom >>>> to features... All looks fine except no actual buffers draw. Symbology >>>> panel looks normal. >>>> >>>> Just wondering if anyone has seen this or knows of a workaround or >>>> thoughts on what I am doing wrong. >>>> >>>> What is the type of your buffer item? What are the typical values? >>> >>> What is your CRS? >>> >>> >>> -- >>> Chris Hermansen · clhermansen "at" gmail "dot" com >>> >>> C'est ma façon de parler. >>> >> > > -- > Chris Hermansen · clhermansen "at" gmail "dot" com > > C'est ma façon de parler. >
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