使用Ruby从CDIP数据创建光谱热图或强度图 [英] Creating Spectral Heat maps or Intensity maps from CDIP data using Ruby

问题描述

背景

根据沿海信息数据程序（CDIP），他们正在生成波浪膨胀的光谱热/强度图， a href =http://cdip.ucsd.edu/?nav=recent&sub=observed&units=metric&tz=UTC&pub=public&map_stati=1,2,3&stn=100&stream=p1& ; xitem = dir_spectrumrel =nofollow> http://cdip.ucsd.edu/?nav=recent&sub=observed&units=metric&tz=UTC&pub=public&map_stati=1,2,3& stn = 100& stream = p1& xitem = dir_spectrum 。

这是用包含能量密度，持续时间（以秒为单位）方向（以度为180度代表南方）。

数据样本

以下是对数据的解释： http://cdip.ucsd.edu/data_access/MEM_2dspectra.cdip

以下是浮标100的数据示例（与热/强度/光谱图中所示相同的浮标： http://cdip.ucsd.edu/data_access/MEM_2dspectra.cdip?100

QUESTION

如何采取这种二维数据并创建热/强度图，确保它覆盖在极地协调地图（并且是适当的比例），就像每个CDIP网站的示例URL一样？

最终，我需要这样做在Ruby中，最好使用ruby-gd或者Rmagick，但是我也会非常感谢任何与语言无关的解决方案。

解决方案

我真的很忙，所以现在不能完成，但是没人回答，这是第一种方法：

$ b $在数学中的代码（对不起，我现在说没有时间）：

  a =导入[http： //cdip.ucsd.edu/data_access/MEM_2dspectra.cdip?100，
Table]; 
 
 Graphics @ Flatten [Table [
 
（* colors，dont mind *）
 {ColorData [CMYKColors] [（a [[r，t] ]  -  .000007）/（。0003  -  0.000007）]，
 
（*点大小，不介意*）
 PointSize [1 / Sqrt [r] / 10]，
 
（*为您的点坐标a是您的数据矩阵*）
点[
 {（rr = Log [.025 +（.58  -  .25）/ 64 r] ）cos @（tt = t 5 Degree），
 rr Sin @ tt}] 
} 
 
（*迭代值）
，{r， 7，64}，{t，1，72}]，1] 
 
（*旋转，不介意*）
 /。 gg：Graphics [___]：>旋转[gg，Pi / 2] 
  

我仍然无法获得正确的颜色比例： p>

BACKGROUND

Per the Coastal Information Data Program (CDIP), they are generating a spectral heat/intensity map for wave swell at http://cdip.ucsd.edu/?nav=recent&sub=observed&units=metric&tz=UTC&pub=public&map_stati=1,2,3&stn=100&stream=p1&xitem=dir_spectrum.

This is dynamically generated with data containing energy density, duration (in seconds) & direction (in degrees with 180 degrees representing south).

DATA SAMPLE

Here's an explanation of the data: http://cdip.ucsd.edu/data_access/MEM_2dspectra.cdip

Here's a data sample for buoy 100 (same buoy as shown in the heat/intensity/spectral map: http://cdip.ucsd.edu/data_access/MEM_2dspectra.cdip?100

QUESTION

How do I take this 2-dimensional data and create a heat/intensity map ensuring that it is overlaid on Polar Coordinate map (and is the appropriate scale), just like the example url per CDIP's site?

Ultimately, I need this to be done in Ruby, preferably using ruby-gd or Rmagick, but I would greatly appreciate any language-agnostic solutions, too.

解决方案

I am really in a rush, so can't finish right now, but as nobody answered yet, here is a first approach:

Code in Mathematica (sorry, as I said no time right now):

a = Import["http://cdip.ucsd.edu/data_access/MEM_2dspectra.cdip?100", 
   "Table"];

Graphics@Flatten[Table[

    (*colors, dont mind*)
    {ColorData["CMYKColors"][(a[[r, t]] - .000007)/(.0003 - 0.000007)], 

    (*point size, dont mind*)
    PointSize[1/Sqrt[r]/10], 

    (*Coordinates for your points "a" is your data matrix *)
       Point[
            {(rr =Log[.025 + (.58 - .25)/64 r]) Cos@(tt = t 5 Degree), 
              rr Sin@tt}]
            }

     (*values for the iteration*)
     , {r, 7, 64}, {t, 1, 72}], 1] 

     (*Rotation, dont mind*)
     /. gg : Graphics[___] :> Rotate[gg, Pi/2]  

I still can't get the right color scale:

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