Display points within a distance radius on a power bi map – dataveld electricity formulas physics


My first inclination was to use the ArcGIS Map for Power BI because of its Drive Time feature. There were three primary challenges with that visual that did not allow me to meet requirements. The first is that while the ArcGIS Map has an option for distance radius, it only allows a maximum of 100 miles / 161 kilometers. The second is that the ArcGIS Map will only display 1,000 points electricity worksheets grade 6 without upgrading to Plus. The third was the largest limitation—users cannot dynamically select new points and are instead limited to points that the content creator chooses.

“But wait David, the Power BI Map won’t draw a circle of a given radius!” Nope electricity notes pdf. Fortunately, having a visible circle is not part of the requirement. Differentiating between points that are in versus out is. You could also approach this with other map visuals, but the core Map has one advantage over custom visuals since it’s native to Power BI and should have organizational support almost everywhere. Some users cannot deploy custom visuals in their organization.

Finding distance along the edge of a sphere calls for the haversine formula. Calculating distance on the earth “as the crow flies” relies on some math that’s outside the scope of my ability. Fortunately, this problem has been solved before electricity history in india and adapted to various code languages. There were a few options on Stack Overflow. While the haversine formula does not account for la gastritis the fact that Earth is not a true sphere, the margin of error is small enough that it won’t matter much when looking at localized distances. Even measuring at the global level, you might end up at maximum a few dozen kilometers off depending on the location of your point of reference and another point across the globe.

I should have done more research on the topic specific to Power BI. It turns out that Phil Seamark already had posted a DAX distance measure about a year and a half ago. I double-checked my calculation versus his, and fortunately, distances match. Doing even more research, there is another post from David Hager with a third alternate formula in DAX. Take your pick. They’re all based on variations of the haversine formula so it shouldn’t matter much whether you opt for the measure electricity vampires I have included, Phil’s, or David’s version. As with Phil, I can’t explain the math in detail, but I can adapt the formula to DAX.

Once the distance measure is available, it can be used in any visual, not simply a map. For my requirement though, I needed a way to display it on a map. Conditional formatting / Advanced Controls under Format – Data Colors to the rescue. The solution that I arrived at was to create a separate measure that had different hex electricity transmission efficiency color values based on the distance. I then used that measure in Advanced Controls with the Map visual.

I broke my values out into a separate “Color Thresholds” table so that the thresholds for the j gastroenterol SWITCH function as well as the colors could be data-driven rather than hardcoded. This adds another layer of complexity though, and in its simpler form, you could get by hardcoding the various SWITCH values. Limit is a number in kilometers and Color is a hex color value. By using SWITCH in this measure, you are able to set as many threshold limits as you desire. I used five main limits that display different colors as points radiate out from the selected location.