Help plotting satellite data?

Question

Davin David 2021-10-29

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1574638-help-plotting-satellite-data

评论： Davin David 2021-10-29

采纳的回答： millercommamatt

在 MATLAB Online 中打开

I'm plotting satellite data taken from an HDF5 file. The following are the parameters

latitude(51x2429) -> lat

longitude(51x2429) -> lon

longwave(51x2429) -> long

I'm using the following code

pcolor(lon,lat,long)
shading interp
colorbar

I get this image

This is what I want to get

I want to remove the bars

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Answer 1

millercommamatt 2021-10-29

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https://ww2.mathworks.cn/matlabcentral/answers/1574638-help-plotting-satellite-data#answer_819783

在 MATLAB Online 中打开

geoshow(lat(:), lon(:), long(:),'DisplayType','ImageMap');

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Davin David 2021-10-29

编辑：Davin David 2021-10-29

I got like this

geoshow(lat(:),lon(:),long(:),'DisplayType','ImageMap')

Error using parseRasterInputs>parseQualifiers (line 138)

Expected input number 5, DISPLAYTYPE, to match one of these

values:

'surface', 'contour', 'mesh', 'texturemap', 'image'

The input, 'imagemap', did not match any of the valid values.

Error in parseRasterInputs (line 37)

parseQualifiers(mapfilename, numel(dataArgs), paramPairs{:});

Error in georastershow (line 82)

parseRasterInputs('geoshow', varargin{:});

Error in geoshow (line 248)

h = showFcn(varargin{:});

>> geoshow(lat(:),lon(:),long(:),'DisplayType','contour')

Error using repmat

Requested 59109x59109 (26.0GB) array exceeds maximum array size

preference (23.8GB). This might cause MATLAB to become

unresponsive.

Error in meshgrid (line 61)

xx = repmat(xrow,size(ycol));

Error in parseContourInputs>checkLatLonZ (line 132)

[lon, lat] = meshgrid(lon, lat);

Error in parseContourInputs (line 42)

R = checkLatLonZ(lat, lon, Z);

Error in contourm (line 99)

[Z, R, levelList, pvpairs] = parseContourInputs(varargin);

Error in georastershow>geocontour (line 126)

[~, h] = contourm(lat, lon, Z, 'Parent', ax, HGpairs{:});

Error in georastershow>displayGeoRasterData (line 113)

h = geocontour(ax, Z, SpatialRef, HGpairs);

Error in georastershow (line 90)

h0 = displayGeoRasterData(ax, displayType, Z, SpatialRef, HGpairs);

Error in geoshow (line 248)

h = showFcn(varargin{:});

Related documentation

>> geoshow(lat(:)',lon(:)',long(:)','DisplayType','image')

Warning: Error creating or updating Surface

Error in value of property ZData

Array is wrong shape or size

>> geoshow(lat(:)',lon(:)',double(long(:)'),'DisplayType','image')

Warning: Error creating or updating Surface

Error in value of property ZData

Array is wrong shape or size

>> geoshow(lat(:),lon(:),long(:))

Warning: Error creating or updating Surface

Error in value of property ZData

Array is wrong shape or size

Walter Roberson 2021-10-29

Sorry, I do not know much about mapping stuff.

Davin David 2021-10-29

No problem thanks for all the help.

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Answer 2

Walter Roberson 2021-10-29

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https://ww2.mathworks.cn/matlabcentral/answers/1574638-help-plotting-satellite-data#answer_819928

Your longitude data "wraps" at 360 degrees.

I speculate that the array starts at about 45 or 50 degrees, increases to 360 degrees, and wraps back to 0 degrees and continues upwards.

If geoshow() does not work for you, then you will need to circshift() your arrays to align them so that the longitude does not wrap back. Or else you need to add 360 to all longitude values after the wrap to get it to display properly.

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Help plotting satellite data?

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