coordinates

问题 I am able to make a plot of data points based on their Lat and Long, which looks like: whereby the orange is made up of points like: using the code: m = Basemap(projection='merc',llcrnrlat=-0.5,urcrnrlat=0.5,\ llcrnrlon=9,urcrnrlon=10,lat_ts=0.25,resolution='i') m.drawcoastlines() m.drawcountries() # draw parallels and meridians. parallels = np.arange(-9.,10.,0.5) # Label the meridians and parallels m.drawparallels(parallels,labels=[False,True,True,False]) # Draw Meridians and Labels

问题 I'm working on an app for fun which allows you to record routes you take. I'm using this to learn about the Google Maps API as well as Phonegap Build, so those are the tools I'm using here. I made a rudimentary app which collects position data (lat,lng) into an array, then uses Google's API to display the results on a map. In the future I'd like to connect them with a line, allow comments, et cetera. Here's what a drive around my neighborhood looks like: Pretty neat. However, something's

问题 I'd like to obtain object IDs from an SVG-file via coordinates. For example in <?xml version="1.0" encoding="UTF-8" standalone="no"?> <svg xmlns:svg="http://www.w3.org/2000/svg" xmlns="http://www.w3.org/2000/svg" version="1.1" height="50" width="50"> <rect id="rectRED" x="15" y="5" height="30" width="30" style="fill:#ff0000;fill-opacity:0.5;stroke:#000000;stroke-width:1.5" /> <rect id="rectBLUE" x="5" y="15" height="30" width="30" style="fill:#0000ff;fill-opacity:0.5;stroke:#000000;stroke

问题 I have a csv file with a following format having four columns (as a MWE ): xcoord1,ycoord1,xcoord2,ycoord2 0.1,0.2,0.4,0.3 0.5,0.3,0.7,0.5 I want to plot a line from each xcoord1,ycoord1 to xcoord2,ycoord2 using gnuplot. For example in this case, I would draw two lines from 0.1,0.2 to 0.4,0.3 and 0.5,0.3 to 0.7,0.5 . How is it possible? 回答1: one solution would be to preprocess your file and generate a Gnuplot script which would employ the set arrow command. Alternatively one can plot the

问题 Is it possible to determine the pixel co-ordinates of a given marker, taking into account current zoom level and visible area of the map? 回答1: Current (v3): map.getProjection().fromLatLngToPoint(marker.position); https://developers.google.com/maps/documentation/javascript/3.exp/reference#Projection Old (v2): The method fromLatLngToContainerPixel following should give you what you're after, assuming markerPoint is your marker, and zoomLevel your current zoom: map.fromLatLngToContainerPixel

问题 I have a piece of code that checks if the given 3 coordinates are linear to one another (if so, return true). But is there a way to make the code give or take a few pixels/plots? private boolean collinear(double x1, double y1, double x2, double y2, double x3, double y3) { return (y1 - y2) * (x1 - x3) == (y1 - y3) * (x1 - x2); } You see, the coordinates have to be exactly inline for it to register as linear. How will I be able to make it look within a 'range' of some kind, for it to check

问题 The sructure of the data is the following df1 <- structure(list(V2 = 1:10, V1 = c(1.4, 1.5, 1.9, 4.5, 6.7, 7.8, 8.1, 8.2, 8.3, 8.9)), class = "data.frame", row.names = c(NA, -10L)) df2 <- structure(list(V2 = 1:10, V1 = c(1.43390152077191, 2.30610947613604, 2.23775280718692, 5.41628585802391, 7.05710641788319, 8.77536501311697, 8.48437852263451, 8.68867353517562, 8.7907762312796, 8.91225462416187 )), row.names = c(NA, -10L), class = "data.frame") df3 <- structure(list(V2 = 1:10, V1 = c(2

问题 The sructure of the data is the following df1 <- structure(list(V2 = 1:10, V1 = c(1.4, 1.5, 1.9, 4.5, 6.7, 7.8, 8.1, 8.2, 8.3, 8.9)), class = "data.frame", row.names = c(NA, -10L)) df2 <- structure(list(V2 = 1:10, V1 = c(1.43390152077191, 2.30610947613604, 2.23775280718692, 5.41628585802391, 7.05710641788319, 8.77536501311697, 8.48437852263451, 8.68867353517562, 8.7907762312796, 8.91225462416187 )), row.names = c(NA, -10L), class = "data.frame") df3 <- structure(list(V2 = 1:10, V1 = c(2

问题 The sructure of the data is the following df1 <- structure(list(V2 = 1:10, V1 = c(1.4, 1.5, 1.9, 4.5, 6.7, 7.8, 8.1, 8.2, 8.3, 8.9)), class = "data.frame", row.names = c(NA, -10L)) df2 <- structure(list(V2 = 1:10, V1 = c(1.43390152077191, 2.30610947613604, 2.23775280718692, 5.41628585802391, 7.05710641788319, 8.77536501311697, 8.48437852263451, 8.68867353517562, 8.7907762312796, 8.91225462416187 )), row.names = c(NA, -10L), class = "data.frame") df3 <- structure(list(V2 = 1:10, V1 = c(2

问题 I am trying to learn how to make a simple website in HTML. Currently I have created a background image that image has multiple shapes on it. I want different parts of the image to be clickable links. I understand how to find the coordinates and use an image map however the clickable links are not working when I change the screen size. How can I make the clickable areas work for different screen sizes? body, html { height: 100%; margin: 0; } .bg { background-position: left; background-repeat: