How can I adjust the patch function to display correctly?

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Alysha Curtis
Alysha Curtis el 26 de Nov. de 2021
Editada: Walter Roberson el 26 de Nov. de 2021
I want to display Wetlands data from the US Fish and Wildlife Service Wetlands Mapping page but I have been running in circles trying to figure out how to map it. I've gotten a display from using patch, but it is clearly incorrect. I do have multiple polygons, but again, not sure how to get them to display correctly. When I try geoshow('CA_Riparian.shp') I get nothing. Could someone help me modify my patch function to get it to display properly? The data can be found here: https://www.fws.gov/wetlands/Data/Data-Download.html
gx = geoaxes;
cali = shaperead('usastatehi.shp', 'UseGeoCoords', true, 'Selector',{@(name) strcmpi(name, 'California'), 'Name'});
lat = cali.Lat;
lon = cali.Lon;
geoplot(gx, lat,lon)
geobasemap(gx,'landcover')
land = shaperead('CA_Riparian.shp', 'UseGeoCoords',true);
ax2 = axes;
latW = land.Lat;
lonW = land.Lon;
patch(ax2,latW,lonW,'red','FaceAlpha',.4)
ax2.Visible = 'off';
ax2.XTick = [];
ax2.YTick = [];
Thank you!

Respuestas (1)

Steven Lord
Steven Lord el 26 de Nov. de 2021
I'm not sure patch is the right tool for this job. Have you tried using geoplot or perhaps patchm from Mapping Toolbox instead?
  1 comentario
Alysha Curtis
Alysha Curtis el 26 de Nov. de 2021
I have, but with geoplot I run into this error:
Error using geoplot(line85)
Expected lat to be an array with all of the values <= 90.
Here's a snippet from my structure and workspace, not too sure how to restrict the size to maybe fix it?
With patchm it struggles with my axes. I have tried taking them off but if I do, it doesn't have any sort of display, only the basemap.

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