Interactive Information Services Using World-Wide Web Hypertext - (current section)

Map Viewer Rendering Options

The URL name space and syntax defined for the map server was chosen to allow the specification of many map rendering options. Any of the following options may occur in a map viewer URL, in any order (except as noted).
/db=database_name
the database name (world, usa)
/lat=latitude_center
the center latitude for the map in degrees (negative for south, default 0)
/lon=longitude_center
the center longitude for the map in degrees (negative for west, default 0)
/ht=latitude_extent
the height of the map in degrees (default 180)
/wd=longitude_extent
the width of the map in degrees (default 360)
/iwd=image_width
the width of the map image in pixels (default 512)
/iht=image_height
the height of the map image in pixels (default 256)
/color
generate color raster images
/bw
generate monochrome bitmaps (default)
/noview
do not show the map as an inlined image (speeds up changing options)
/view
show the map as an inlined image (default)
/nozoom
do not zoom in on position selections
/autozoom=zoom_factor
change the zoom factor for position selections
/all
show all map features
/def
show default map features
/feature_name
show the named feature (coast, border, river, road, RR, fed.)
/feature_name=0
do not show the named feature
/proj=projection_name
specifies the map projection (ellipse, rect, sine)
/nogrid
do not show the map graticule (lines of latitude/longitude)
/grid
show the graticule unless zoomed very far in (default)
/mark=latitude,longitude,mark_type,mark_size
place a mark on the map. ",mark_type" (1..7) and ",mark_size" (in pixels) are optional. multiple marks can be separated by ";".
?xpos,ypos
specifies a position selection within a map image in pixel coordinates (generated from ISMAP inlined images). This must occur last in the URL.
/format=.gif
used when requesting just an image, rather than an HTML document. This must occur last in the URL.