Set or query pitch angle of camera for geographic globe
Set Pitch and Mode
the pitch angle of the camera for the specified geographic globe. Setting the pitch angle
tilts the camera up or down. For more information about how camera rotations affect your
view of the globe, see How Camera Orientation Affects Globe View.
campitch( sets the camera pitch to
automatic mode, enabling the geographic globe to determine the pitch angle based on
plotted data. The mode defaults to automatic when you create a geographic globe. If you
interact with the globe using your mouse, then the mode switches to automatic.
Change Pitch Angle of Camera
Create a geographic globe. Position the camera near Mount Kilimanjaro by specifying a latitude, longitude, and ellipsoidal height. Set the pitch angle to 0 degrees, so that the camera points across the summit.
uif = uifigure; g = geoglobe(uif); campos(g,-3.1519,37.3561,5500) campitch(g,0)
Tilt the camera up by increasing the pitch angle to 15 degrees.
Animate Changes to Pitch Angle
Create a geographic globe. Position the camera near Mount Washington by specifying a latitude, longitude, and ellipsoidal height. Change the heading angle so that the camera faces the mountain. By default, the pitch angle is –90 degrees, so that the camera points at the ground.
uif = uifigure; g = geoglobe(uif); campos(g,44.2668,-71.3849,1757) camheading(g,90)
Animate the view by incrementally changing the pitch angle. As the pitch angle increases, the camera changes from pointing at the ground to pointing at the sky. After the animation finishes, change the pitch angle to 0 degrees.
for pitch = -90:2:90 campitch(g,pitch) drawnow end campitch(g,0)
Get Information About Camera View
Get the position and the heading, pitch, and roll angles of the camera. Use this information to control the view of a different geographic globe or to automate navigation.
Create a geographic globe. Navigate to an area of interest using your mouse or gestures. For this example, navigate to an area around Hawaii.
uif = uifigure; g = geoglobe(uif);
Query the latitude, longitude, and ellipsoidal height of the camera, and assign each to a variable.
[camlat,camlon,camh] = campos(g)
camlat = 18.1781 camlon = -155.9297 camh = 6.6664e+04
Query the heading, pitch, and roll angles of the camera, and assign each to a variable.
heading = camheading(g) pitch = campitch(g) roll = camroll(g)
heading = 16.7613 pitch = -24.1507 roll = 359.9977
Use these values to control the view of a different geographic globe. For example, create a new geographic globe and programmatically set the view.
uif2 = uifigure; g2 = geoglobe(uif2); campos(g2,camlat,camlon,camh) camheading(g2,heading) campitch(g2,pitch) camroll(g2,roll)
Preserve Camera View
Preserve the position and the heading, pitch, and roll angles of the camera by setting the camera modes to manual. If you do not set the camera modes to manual, then the camera view resets when you plot new data.
Import a sample route along roads in Massachusetts using the
gpxread function. Create a geographic globe with a road map
and no terrain data. Preserve the basemap and terrain settings by using the
hold function. Then, navigate to an area near Eastern
Massachusetts using your mouse.
track = gpxread('sample_tracks.gpx','Index',2); lat = track.Latitude; lon = track.Longitude; height = track.Elevation; uif = uifigure; g = geoglobe(uif,'Basemap','streets','Terrain','none'); hold(g,'on')
Set the camera modes to manual and plot the data. Note that the camera position does not change.
campos(g,'manual') camheight(g,'manual') camheading(g,'manual') campitch(g,'manual') camroll(g,'manual') geoplot3(g,lat,lon,height,'LineWidth',3)
g — Geographic globe
Geographic globe, specified as a
pitch — Pitch angle of camera
–90 (default) | scalar
Pitch angle of the camera, specified as a scalar value in the range [–90, 90] degrees. By default, the pitch angle is –90 degrees, which means that camera points directly toward the surface of the globe.
How Camera Orientation Affects Globe View
The values of the camera heading, pitch, and roll angles affect your view of a geographic globe. Mapping Toolbox™ references these values to the globe using a north-east-down (NED) coordinate system. As a result, when the heading, pitch, and roll angles of the camera are zero, the camera sits on a plane that is parallel to the tangent plane of the globe at the current latitude and longitude. For more information about NED coordinate systems, see Comparison of 3-D Coordinate Systems.
Change your view of a geographic globe by changing the heading, pitch, and roll angles of the camera:
Heading — Rotate the camera about its z-axis, which shifts the view left or right. Move the view to the right by increasing the heading angle.
Pitch — Rotate the camera about its y-axis, which tilts the view up or down. Tilt the view up by increasing the pitch angle.
Roll — Rotate the camera about its x-axis, which spins the camera around its lens. Spin the view counterclockwise by increasing the roll angle.
When the pitch angle is near –90 (the default) or 90 degrees, the camera loses one rotational degree of freedom. As a result, when you change the roll angle, the heading angle may change instead. This phenomenon is called gimbal lock. To avoid the effects of gimbal lock, call the
camheadingfunction instead of the
Introduced in R2020b
1 Alignment of boundaries and region labels are a presentation of the feature provided by the data vendors and do not imply endorsement by MathWorks®.