Plotting the density of latitude and longitude points as a heat map on geographic data

Question

Alex Lojko 2017-11-23

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/368811-plotting-the-density-of-latitude-and-longitude-points-as-a-heat-map-on-geographic-data

移动：Dyuman Joshi 2023-10-2

Hello, I have tried posting this elsewhere with no luck.

In continuation with my project for plotting lightning over the territory of Poland, I would like to plot the density of latitude and longitude points. So, areas which have more latitude & longitude points over the territory will have a different colour to areas with less latitude & longitude points. Currently I am able to plot latitude and longitude on a map; however, I would like the plots to have different colours depending on their density on this map:

https://imgur.com/a/OqcGq

I have tried many approaches but I have not found anything that works for my case.

I have tried creating a heatmap of points using the hist3 command; whilst this creates a heatmat with respect to density of points. It is a square grid and I cannot transpose this onto my map. I also tried downloading some functions from mathsworks such as this one: https://uk.mathworks.com/matlabcentral/fileexchange/8577-scatplot This is the closest I have gotten to somewhat plotting what I want: https://imgur.com/a/hn9uc using the command: scatplot(perun10_16.longitude, perun10_16.latitude, 'circles') Unfortunately, I do not know of a way to transfer this graph as spatial data onto my map of Poland using command: h = worldmap([48 57], [13 26]) % S = shaperead('POL_adm0.shp', 'UseGeoCoords', true); geoshow(h, S, 'Facecolor',[0.5 0.8 0.7])

% hold on

scatplot(perun10_16.latitude, perun10_16.longitude, 'circles')

% perun10_16.latitude and longitude represents the month of october, 2016.

I am aware that simply slapping on the scatplot function onto my map is not enough to get my idea working. If there was also a way to import a polygon outline of the map of Poland onto the figure I have created, that would also be acceptable; however, I am not sure how to do that either.

I hope this is enough information to know what I am doing. Does anyone have any suggestions as to what I should try now?