The ZoomIn command zooms in the view with respect to some focus point.

If only m is given, the focus point will be the current view center.

If ref is supplied, ref must contain exactly one row, so that it corresponds to exactly one point.

If a point p is supplied, p will be the focus point for zooming in.

p must be a list of two elements. The first element in p is the longitude (x-coordinate in the Geographic projection), and the second element in p is the latitude (y-coordinate in the Geographic projection).

The ZoomOut command zooms out the view with respect to some focus point.

If only m is given, the focus point will be the current view center.

If ref is supplied, ref must contain exactly one row, so that it corresponds to exactly one point.

If a point p is supplied, p will be the focus point for zooming out.

p must be a list of two elements. The first element in p is the longitude (x-coordinate in the Geographic projection), and the second element in p is the latitude (y-coordinate in the Geographic projection).

$\mathrm{ref}≔\mathrm{DataSets}:-\mathrm{Builtin}:-\mathrm{Reference}\left(''Geonames''\right)\left[\left[\mathrm{Country}=''Canada''\,\mathrm{Name}=''Waterloo''\right]\right]$

$\mathrm{ref}≔\left[\begin{array}{ccccc}\mathrm{Geonames\; (GeoNamesid)}& \mathrm{Name}& \mathrm{Type}& \mathrm{\dots }& \mathrm{(7\; more)}\\ \mathrm{6176821}& \mathrm{Waterloo}& ''populated\; place''& \mathrm{\dots }& \\ \mathrm{6176823}& \mathrm{Waterloo}& ''populated\; place''& \mathrm{\dots }& \\ \mathrm{8673866}& \mathrm{Waterloo}& ''third-order\; administrative\; division''& \mathrm{\dots }& \end{array}\right]$

$m≔\mathrm{DataSets}:-\mathrm{Builtin}:-\mathrm{WorldMap}\left(\mathrm{ref}\right)$

$m≔\left(\begin{array}{cc}\left[\mathrm{PLOT}\left(\mathrm{...}\right)\right]& \begin{array}{c}\mathrm{A\; map\; of\; the\; world\; with\; 3\; points}\\ \mathrm{projection:\; MillerCylindrical}\end{array}\end{array}\right)$

$\mathrm{Display}\left(m\right)$

$\mathrm{ZoomOut}\left(m\right)$

$\left(\begin{array}{cc}\left[\mathrm{PLOT}\left(\mathrm{...}\right)\right]& \begin{array}{c}\mathrm{A\; map\; of\; the\; world\; with\; 3\; points}\\ \mathrm{projection:\; MillerCylindrical}\end{array}\end{array}\right)$

$\mathrm{Display}\left(m\right)$

$\mathrm{ZoomOut}\left(m\right)$

$\left(\begin{array}{cc}\left[\mathrm{PLOT}\left(\mathrm{...}\right)\right]& \begin{array}{c}\mathrm{A\; map\; of\; the\; world\; with\; 3\; points}\\ \mathrm{projection:\; MillerCylindrical}\end{array}\end{array}\right)$

$\mathrm{Display}\left(m\right)$

$\mathrm{ZoomIn}\left(m\,\mathrm{ref}\left[1\right]\right)$

$\left(\begin{array}{cc}\left[\mathrm{PLOT}\left(\mathrm{...}\right)\right]& \begin{array}{c}\mathrm{A\; map\; of\; the\; world\; with\; 3\; points}\\ \mathrm{projection:\; MillerCylindrical}\end{array}\end{array}\right)$

$\mathrm{ZoomIn}\left(m\,\mathrm{ref}\left[1\right]\right)$

$\left(\begin{array}{cc}\left[\mathrm{PLOT}\left(\mathrm{...}\right)\right]& \begin{array}{c}\mathrm{A\; map\; of\; the\; world\; with\; 3\; points}\\ \mathrm{projection:\; MillerCylindrical}\end{array}\end{array}\right)$

$\mathrm{Display}\left(m\right)$

The DataSets[Builtin][WorldMap][ZoomIn] and DataSets[Builtin][WorldMap][ZoomOut] commands were introduced in Maple 2017.

For more information on Maple 2017 changes, see Updates in Maple 2017.