How to fix the "Error downloading URL" in MATLAB when increasing the range and include mountain and foliage details in the generated scenario?

p = inputParser;
validScalarNum = @(x) isnumeric(x) && isscalar(x);
validScalarPosNum = @(x) isnumeric(x) && isscalar(x) && (x > 0);
addOptional(p,'Latitude',35.286417, validScalarNum)  % NU campus location as default
addOptional(p,'Longitude',75.61963, validScalarNum)   
addOptional(p,'Range',10000, validScalarPosNum)          % 50000 meters range as default
addParameter(p,'osmFileName', 'scenario.osm', @ischar)
parse(p,varargin{:});
scenarioLat = p.Results.Latitude;
scenarioLon = p.Results.Longitude;
range = p.Results.Range;
scenarioFileName = p.Results.osmFileName;
% Convert input distance to earth degrees (Lat, Lon are given in degrees)
distUnits = 'm';
arclen = rad2deg(range/earthRadius(distUnits));
[lat1,~] = reckon(scenarioLat, scenarioLon,arclen,0);
[lat2,~] = reckon(scenarioLat, scenarioLon,arclen,180);
[~,lon1] = reckon(scenarioLat, scenarioLon,arclen,90);
[~,lon2] = reckon(scenarioLat, scenarioLon,arclen,270);
url = sprintf('https://www.openstreetmap.org/api/0.6/map?bbox=%0.4f%%2C%0.4f%%2C%0.4f%%2C%0.4f',lon2,lat2,lon1,lat1);
urlwrite(url,scenarioFileName);
end

when i increased the range from 5000, i can,t download the scenerio and how i can add information like mounatins and foliage in this scenerio?

Answer 1

[Hassaan]

The "Error downloading URL" you're experiencing in MATLAB when increasing the range for your OpenStreetMap (OSM) query likely stems from the fact that larger ranges result in requests for more data. OSM has limits on the size of the area you can download in a single query to prevent overloading their servers. When you exceed these limits, the server may refuse your request, resulting in an error

1. Check API Limits: Verify the maximum allowed area for a single download request on the OSM API documentation. Ensure your range variable does not exceed this limit.
2. Error Handling: Implement error handling in your script to catch and understand the errors. Modify the urlwrite line to something like this:

try
    urlwrite(url, scenarioFileName);
catch exception
    disp('Error downloading URL:');
    disp(getReport(exception));
end

Reduce Range: If the range is too large, consider downloading the data in smaller sections and then combining them.

Efficient Requests: If you frequently need to download large areas, consider setting up a local OSM server or using a commercial OSM service that allows for larger requests.

Include Topographical Details: OSM primarily provides street maps and may not have the level of detail you need for mountains and foliage. For such details, you might need to integrate data from other sources like the USGS Earth Explorer or NASA's SRTM data. These sources provide topographical data which can give you information about elevation and terrain.

Data Processing: Once you have the topographical data, you will need to process it to integrate with your OSM data. This might involve converting data formats, aligning coordinate systems, and interpolating data to match the resolutions.

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Answer 2

[Shujaa]

[Shujaa]

please Dont used AI tools for the answers