How to view a shape file in matlab
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Hello,
I have a .shp file of the country Ireland.
I read the file into matlab using the code:
S = shaperead('Ireland.shp')
My question is how can I view the map?
I would appreciate it if anybody had the time to show me.
Also, is it possible to overlay GPS data on a file of this type?
Thank you
1 个评论
alessio grechi
2018-10-18
编辑：alessio grechi
2018-10-18
ciao. Sei riuscito a far visualizzare la mappa in MatLab?
采纳的回答
José-Luis
2012-12-24
doc mapshow
It can be as simple as:
S = shaperead(filename);
mapshow(S);
As long as you have latitude and longitude, you can plot pretty much anything
doc plotm
6 个评论
John
2012-12-24
José-Luis
2012-12-24
The short answer:
Use plot instead of plotm
The longer answer:
plotm is complaining that the current axes are not map axes. Map axes are better since they can handle projections and will not distort your data as vanilla axes will do. So, if you want to be thorough, first create an axesm object and plot your shapefile and point on it.
doc axesm
John
2012-12-24
José-Luis
2012-12-24
My pleasure.
Hello,
When I use the plot function the point does not appear to be displayed on the map. I can't see it.
Also, I tried the other method, I displayed the map and typed "axesmui" but it says "not a map axis".
Can I ask the question, is the map I have suitable for overlaying latitude and longitude data on it. The axes scales don't seem to be in lat long format. Are they?
Would you know where I could source a suitable map?
What I am trying to do is overlay GPS data from a car on map and reproduce something like this:
I appreciate your help.
Thanks
J
José-Luis
2012-12-24
If you are plotting a point, are you sure your Marker is large enough so you can see it, try a large size first
plot(x,y,'LineStyle','none','Marker','o','MarkerSize',20);
The map you are linking to does not appear to be in lat-long, it looks like UTM.
I don't know where you could find a suitable map, but google can help you. You could also look at worldmap() from Matlab.
更多回答（2 个）
John
2012-12-25
Hi Jose,
Thank for your help with this. I managed to get it working in the end. I sourced a better map using your suggestion worldmap().
I have one further question if you don't mind.
I am getting this map using the code below.
ax = worldmap('ireland');
land = shaperead('landareas', 'UseGeoCoords', true);
geoshow(ax, land, 'FaceColor', [0.5 0.7 0.5])
How can I just limit the display to just display between Lat 51-55.5 and long 5-10.5. I just want to display Ireland.
Thank you
J
5 个评论
ax = axesm('MapProjection','mercator','MapLatLimit',[50 55.5],...
'MapLonLimit',[-10.5 -5],'Frame','on')
land = shaperead('landareas', 'UseGeoCoords', true);
geoshow(ax, land, 'FaceColor', [0.5 0.7 0.5])
Please read the documentation about axesm() if you want to tweak the display.
John
2012-12-25
John
2012-12-25
Hi,
I got this to work very well. Thanks for your help.
Can I ask you is it possible to use the colourmap editor on maps? I tried to use it to display areas with varying amounts of data in a different colours but it all stays blue.
Would you have any suggestions?
Thank you
J
José-Luis
2012-12-25
doc plotm
Harold Steven Buitrago Segura
2022-4-29
Maybe you could use the geolimit function
Clelia Massarino
2018-9-20
0 个投票
Hello,
I am having problem displaying the Germany map. My final goal is to have one with the elevation or at least different colors to discern different altitudes. I used the same code of you but it starts running endlessly. Any suggestion?
1 个评论
Alessandro Mura
2021-12-21
@Clelia Massarino sei riuscito a cambiare i diversi colori della mappa della Germania? se si ti posso chiedere per favore lo script?
ti ringrazio
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