Transform an image of a geographic area to a Matlab map

Question

Marius Marinescu 2020-7-20

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/567798-transform-an-image-of-a-geographic-area-to-a-matlab-map

评论： Marius Marinescu 2020-7-27

采纳的回答： Kiran Felix Robert

Hello,

I have the following map (is an image in format .jpg):

that represents an area around the airport Madrid Barajas. I have flying aircrafts data and position of them in latitude and longitude. I would like to plot that geographic data over this image. For that I need to transform this image into a map object. How can I do that? I know the latitude and longitude limits of the map, so I think must be a way.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Kiran Felix Robert 2020-7-23

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/567798-transform-an-image-of-a-geographic-area-to-a-matlab-map#answer_469947

在 MATLAB Online 中打开

Hi Marius,

It is my understanding that you have an image file of a region with corresponding Latitude and Longitude limits, and you wish to convert it to a GeoTIFF file. This can be done using the Mapping Toolbox.

There are specific functions for this such as georefcells, as you know the latitude and longitude limits. The Reference object can be created using the georefcells, and the reference object can be used to write the image into a GeoTIFF file as illustrated in the article here.

Assuming you have the Latitude limit as (-20,20) and longitude limit as (-30,30), a simple example is as follows,

img = imread('map.jpeg'); 
lat_limits = [-20 20];  
lon_limits = [-30 30]; 
[x,y,~] = size(A2); 
r_size = [x y];  
R = georefcells(lat_limits,lon_limits,r_size); 
geotiffwrite('MapOut.tif',img,R); 