Lisa
  • Member for 5 years, 9 months
  • Last seen this week
  • Edmonton, AB, Canada
What is my coordinate system preserving?
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14 votes

From the links posted as comments I identified a couple of misconceptions I had about projections and gathered this quick summary. It should be mentioned that many projections don’t truly preserve ...

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Modifying center of equirectangular world map in QGIS?
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6 votes

A helpful page for customizing projections in QGIS is this one, explaining the parameters of Proj.4 projections. To get you started I would sugget the Michigan oblique Mercator projection; it should ...

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Categorized symbology for polygons using QGIS
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5 votes

A bit of a work-around but you could split the data into two layers if its not already and do a monochrome scheme (greys ramp) with the subordinate areas and then a semi-transparent colour scheme for ...

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How to make a fictional city map?
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2 votes

Yeah I agree with J.R's answer, QGIS is certainly an option and I might even go that route since I'm already familiar with it, but for someone who hasn't use it much I'd probably suggest something ...

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Leaflet - trying to use markerclustergroup feeding it polygons
2 votes

You say "I have been trying to calculate center of mass for the polygons" sounds like what you're looking for is the centroid. Finding polygon centroids is a fairly straightforward processing task in ...

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Merge layers with different geometry
2 votes

Assuming a provincial centroid wont cut it, I would just buffer the points to an appropriate distance for your purpose and use those polygons to merge with the provincial boundary.

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Choosing Canadian province for studying GIS and finding professional opportunities
1 votes

I can't say I have specific knowledge here, but I'd say you're probably right with BC's job market being a bit more promising than Nova Scotia's. Here's a real quick breakdown of some provincial ...

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Reproject with shifted central meridian - dateline gap in ArcGIS
1 votes

Normally I use this for a similar looking display issue East-West across the map, but you could try moving the wrap parameter the .prj file. (e.g. +lon_wrap=-180) See wrap parameter explanation here. ...

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IIF statement semantics Arcade
1 votes

Ok, I ended up basically just reversing the statement and got it to work (though for some reason the true half of the statement didn't work without the quotes around the 10) IIf($feature["PERCENT_A"]&...

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How to download images from google maps using RgoogleMaps
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1 votes

If you just need to see google images as a layer in QGIS you could bring them into QGIS as a raster (.xml file) as suggested in this answer. Why are the Google basemaps no longer appearing in QGIS?

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Modifying center of equirectangular world map in QGIS?
1 votes

Upon some further research, I came across "Adaptive Composite Map Projections" by Bernard Jenny. In it I found this graphic of interest. Maybe the Hammer or Modified Hammer projection is the way to go....

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Using boundaries of city to cover world outside of it in solid color?
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1 votes

See Inverting Polygons using QGIS? Here's a basic summary of that post's answers and comments with some additional info: Step 1) Get Ocean data: http://www.naturalearthdata.com/features/; http://...

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Where do I find city/town point locations in US census data?
1 votes

One solution would be to take the centroid of each polygon to get a point set. Depending on the software you may have the option to create the new point file in the format you want instead of having ...

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Aerial picture - how can I extract water drainages on a crop (to vectorize them)
1 votes

I would probably start by reclassifying your raster on the various bands and seeing how best you could isolate that specific green. I find the identify tool and checking out multiband scatterplots or ...

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Issue with QGIS 2.10.1 Clip and Intersect Tools
1 votes

I believe the red layer is what you're after, yes? I used the "Polygon intersection" tool from the processing toolbox (under Geoalgorithms, Vector, Polygons)

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Converting local Coordinates to lat/long Coordinates using QGIS?
0 votes

Definetly a work-around, but I normally just save a duplicate of my file in a projection that uses lat/lon, visually make sure that my points are in the right location e.g. not the middle of the ocean,...

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Finding multiple least-cost-paths for a network of several points using QGIS?
0 votes

This to me sounds similar to a water flow analysis on a DEM. That basically calculates the lowest surrounding point and draws the path of water. Maybe this type of approach would be a helpful place ...

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How to use field calculator to create a field based on another?
0 votes

Like others have suggested I think field calculator is the way to go on this one. I would just create a new field called TRS using a similar expression to the one you created the labels with.

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Using field from another table in popup of ArcGIS Web AppBuilder
-1 votes

I'm not sure I totally understand what you're looking for, but I have been able to customize popups from the underlying web map (as opposed to from within the web app builder). I think you should be ...

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