units-of-measurement

I'm working with a geographic point using lat/long and need to find other points in our database within a 5 mile radius of that point. However, I can't seem to find out what the "units" are for STBuffer, it doesn't seem to conform to feet, miles, meters, kilometers, etc. The documentation only refers to them as "units", any suggestions? Thanks [...] from geography::STGeomFromText('POINT(x y)', 4326).STBuffer(z).STIntersects(geography::STGeomFromText('POINT(' + CAST(v.Longitude as varchar(max)) + ' ' + CAST(v.Latitude as varchar(max)) + ')', 4326)) = 1 STBuffer is in meters. More info here. To

I want to draw text with an specific height(in pixels) on a view using Canvas . Can you simply use Paint.setTextSize(float) with the number of pixels or is this using dp or sp ? It uses pixels, but you can convert it to dp using this code: double getDPFromPixels(double pixels) { DisplayMetrics metrics = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(metrics); switch(metrics.densityDpi){ case DisplayMetrics.DENSITY_LOW: pixels = pixels * 0.75; break; case DisplayMetrics.DENSITY_MEDIUM: //pixels = pixels * 1; break; case DisplayMetrics.DENSITY_HIGH: pixels = pixels * 1.5

Is there built in version of the type casting functions that preserves units and if not how would I make them? So for example with this code how would I cast intWithSecondsMeasure to a float without losing the measure or multiplying by 1.0<s> ? [<Measure>] type s let intWithSecondsMeasure = 1<s> let justAFloat = float intWithSecondsMeasure The answer provided by @kvb certainly works, but I'd prefer not to use the unbox operator for this conversion. There's a better, built in way that I think should be compiled as a NOP to IL (I haven't checked but unbox is probably going to end up as a unbox

Recently I discovered WPF supports different measurement units in XAML. Besides default DIPs, there is also support for pixels, inches and centimeters (as far as I know). This allows designer to write XAML such as this: <Canvas> <Line X1="0cm" X2="3cm" Y1="1cm" Y2="3cm" Stroke="Black"/> </Canvas> However, you cannot bind these values. Imagine we have a ViewModel with Dimension property which is a String, for example "7cm". Following won't work: <Button Width="{Binding Dimension}">Test</Button> FormatException gets thrown. Similarly, when creating a FrameworkElement in code-behind, like this:

Regardless of whether it is HTML, XHTML or HTML5 you find those annoying percentages littered throughout the place. Yet... I see an awful lot of websites dare not go near them. Yet I was always encouraged through uni to use them. So which should I be using? Which would lead to better site design and why? I'm aware to avoid the use of height although HTML5 really doesn't like me not specifying height if I want to use percentages. Thanks for taking the time to read. It really depends on what you do you want to build up. Sometimes I need to build a website which could be read by people with

I'm in the process of learning F# - and is currently looking into Units of Measure. I have a simple calculation returning meters per second, and I want to introduce a function converting it to kilometres per hour. My code looks like this: [<Measure>] type kg [<Measure>] type s [<Measure>] type m [<Measure>] type km [<Measure>] type h let msToKmph(speed : float<m/s>) = (float speed) * 3.6<km/h> let gravityOnEarth = 9.81<m/s^2> let heightOfJump = 3.5<m> let speedOfImpact = sqrt (2.0 * gravityOnEarth * heightOfJump) let speedOfImpactKmh = msToKmph(speedOfImpact) This works - I get 8.28673639 m/s