cartesian-coordinates

I have an image from weather radar which is in polar coordinates (azimuth, range). Normal resizing functions are not working as they presume the image in Cartesian coordinate I guess. From scikit-image etc. How can I resize the image effectively having same ratio and characteristics maintained as we get in Cartesian. Or the only way is to convert to Cartesian and then back ? Original (masked array) displayed using weather lib: Polar Cordinates Contour based: resized the array (and plotted using imshow) Resizing the third graph works well but I need resized version of the first polar

I'm still implementing a perspective projection for my augmented reality application. I've already asked some questions about the viewport-calculation and other camera stuff, which is explained from Aldream in this thread However, I don't get any useful value at the moment and I think this depends on my calculation of the cartesian coordinate space. I had some different ways to transform latitude,longitude and altitude to a cartesian coordinate space, but nothing of them seems to work properly. Currently I'm using ECEF(earth centered), but I also tried different calculations like a combination

I downloaded weather data and it has longitude (in decimal), latitude (in decimal), and elevation (in m) values. There is no information about the coordinate system used. How I can convert it to cartesian coordinates ?. My attempts are below. But, my problem is to find the right formulas def cartesian(self,longitude,latitude, elevation): R = 6378137.0 + elevation # relative to centre of the earth X = R * math.cos(longitude) * math.sin(latitude) Y = R * math.sin(longitude) * math.sin(latitude) Z = R * math.cos(latitude) def cartesian3(self,longitude,latitude, elevation): X = longitude * 60 *

I am working on a spatial analysis problem and part of this workflow is to calculate the angle between connected line segments. Each line segment is composed of only two points, and each point has a pair of XY coordinates (Cartesian). Here is the image from GeoGebra. I am always interested in getting a positive angle in 0 to 180 range . However, I get all kind of angles depending on the order of vertices in input line segments. The input data I work with is provided as tuples of coordinates. Depending on the vertex creation order, the last/end point for each line segment can be different. Here

I have a latitude/longitude decimal coordinates that I would like to convert to points that will fit within the area of the iPad coordinate system. My code takes in a latitude/longitude coordinates and converts them to cartesian coordinates (based on this question: convert to cartesian coordinates ) The results of the conversion are (2494.269287, 575.376465). Here is my code (no compile or runtime errors): #define EARTH_RADIUS 6371 - (void)drawRect:(CGRect)rect { CGPoint latLong = {41.998035, -116.012215}; CGPoint newCoord = [self convertLatLongCoord:latLong]; NSLog(@"Cartesian Coordinate: (%f