# Rob Comer

### MathWorks

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Rob Comer is the Mapping Toolbox(TM) development lead at The MathWorks, Inc.

Professional Interests: software engineering, geodesy and geophysics, photogrammetry and image processing, geographic information systems

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**Feeds**

Calculate distance between two coordinates with depth

As Dr. Kearney suggested, the Mapping Toolbox can help. If you have it, try using ecefOffset. It computes the 3-D offset vector ...

mer än 2 år ago | 0

Need to Understand Treatment of Elevation in los2

LOS2 interpolates values along a profile between the specified points, then calculates visibility using that profile. So no, it ...

mer än 2 år ago | 0

| accepted

Multiple geoplot lines with one call

You can use plot() to plot matrices in a geographic axes Any easy workaround is to (a) create a GeographicAxes object and (b) a...

nästan 3 år ago | 1

Axes control for geoscatter, set the lat and lon limits and remove unwanted, repeated map geography

In your call to geolimits, you specifed latitude limits that extend all the way to the North Pole: geolimits([-70 90], [-179 17...

ungefär 3 år ago | 0

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MATLAB: save geospatial polygons in a *.kml file

See the example Write Polygon Data to KML File on the kmlwrite reference page.

ungefär 3 år ago | 0

load coast command not executing in 2018a, pls. suggest an alternative

Beginning in R2020b, coast.mat is no longer available in Mapping Toolbox. Please use its replacement, coastlines.mat, instead. T...

mer än 3 år ago | 1

display of natural earth shapefile as polygon

Hi Hanna, Try clipping the ocean polygon like this before calling geoshow: [oceanLat,oceanLon] = maptriml(oceanLat,oceanLon,[-...

mer än 3 år ago | 1

| accepted

polybool error because of invalid polygon

Errors like these can easily arise from small defects in the topology of the input polygons. The MATLAB polyshape class (with me...

nästan 5 år ago | 0

Lambert vs. Lambert Standard

Typically, one would use lambertstd, especially if unprojecting an external dataset from x-y (easting-northing) to latitude-long...

nästan 5 år ago | 0

Spatially thin out trajectory of 3D points

You'll have to write your own function, but the ecefOffset function in Mapping Toolbox can help. Try something like this (assumi...

nästan 5 år ago | 0

Use custom basemap for geobubble function

With Mapping Toolbox and MATLAB R2018b or later, you can use the addCustomBasemap function with geobubble (and geoaxes).

nästan 5 år ago | 0

| accepted

MATLAB: save geospatial polygons in a *.kml file

With Mapping Toolbox and MATLAB R2016a or later, you can use the kmlwritepolygon function.

nästan 5 år ago | 0

Submitted

Earth Observing System Data Visualization

Read Earth Observing System (EOS) data products in HDF format and visualize them in MATLAB(R).

ungefär 8 år ago | 11 downloads |

Submitted

colorscale

Add a color scale bar using part of the figure's colormap.

ungefär 8 år ago | 1 download |

is it possible to import GPS data in DDD format and create a map with the points plotted?

You could start with the readtable function.

mer än 8 år ago | 0

Modify Labels on Contour Plots

R2014b and R2015a users can apply one of the workarounds available here: <http://www.mathworks.com/support/bugreports/1114747...

ungefär 9 år ago | 2

Using pcolorm with irregular model grids

Hi Andrew, With an irregular grid, for which a full latitude-longitude geolocation mesh is needed, I think it's always approp...

mer än 9 år ago | 0

How does the contour plot with R2014b work?

You can avoid the problem with the clabel function, which is present in both R2014b and R2015a, by using one of the workarounds ...

mer än 9 år ago | 0

Exported figure size is huge and specified font of the label is ignored in 2014b

Regarding part 1 of this question, you can control the contour label FontName and other label text properties in R2014b or R2015...

mer än 9 år ago | 0

How to alter contour label properties?

If you download and install one of the workarounds available here for R2014b or R2015a: <http://www.mathworks.com/support/bugrep...

mer än 9 år ago | 1

| accepted

Fontsize in clabel with rotated labels 2014b

If you download and install one of the workarounds available here for R2014b or R2015a: <http://www.mathworks.com/support/bugrep...

mer än 9 år ago | 0

How do you format rotated text from clabel in MATLAB 2014b?

You can avoid this problem, which is present in both R2014b and R2015a, using one of the workarounds available here: <http://www...

mer än 9 år ago | 0

Problems with wrapTo180, creates lines on map

Instead of wrapping your longitudes, try using the maptriml function with latlim = [-90 90] and lonlim = [-180 180]. Because the...

mer än 9 år ago | 0

How to find the border points for a set of latitude and longitude coordinates

With such a small data extent, you can probably ignore the wrapping of longitude around the earth when computing latitude and lo...

ungefär 10 år ago | 0

How to plot a shapefile on top of digital elevation model using mapshow (or other)

If you only wish to view your map in 2-D, you can plot the terrain raster in the z == 0 plane, like this: mapshow(zeros(siz...

ungefär 10 år ago | 1

| accepted

Problem reading ESRI Grid format

There are two different ESRI (Arc) Grid formats: the proprietary binary format, which is what you have, and the publicly documen...

ungefär 10 år ago | 0

| accepted

How to use additional files like e.g. gshhs_h.b, WORLDDATAMAP, etc.?

You should first check that the mapdata folder is on your MATLAB path. You could then try: which gshhs_h.zip You may need ...

mer än 10 år ago | 0

| accepted

FaceAlpha of surf plot takes the first row and column twice

This variation does what I think you're hoping for: [X,Y] = meshgrid(1:5,1:5); Z = ones(5,5); C = ones(4,4); A = z...

mer än 10 år ago | 0

| accepted

Filling a polygon using an index and colormap

The key to making many thematic maps is to use the *makesymbolspec* function in combination with *geoshow* or *mapshow* . In thi...

nästan 11 år ago | 3

| accepted