NAME
     mapserv - map database server

SYNOPSIS
     mapserv [-p port] [scriptfile(s)]

DESCRIPTION

mapserv is a spatial database server that can read in feature sets
(feature classes) from map databases, select and manipulate them
with an attribute expression mechanism, processes them with a polygon
intersection mechanism, and export them to remote viewers.  A user (or
client program) can interact with mapserv via stdin and stdout or
telnet.  The command syntax is a semi-colon separated list of commands
with arbitrary number of parameters enclosed in parenthesis, with
support for optional parameters and keyword arguments, i.e:

  command1(arg1 arg2 :key1 val1 :key2 val2);command2(arg1 :key1 val1)

The literals and operators of C are all supported except for the
syntax of the conditional operator "?:".  See the comterp
documentation for more details.  

In the command documentation below, str's are character strings, int's
are integers, and fclass points to a MapFeatureClass object.  "[]"
indicates an optional argument:

MAP FEATURE CONSTRUCTION COMMANDS

feature=pointfeature(x0 y0 :id idnum) -- create point feature
feature=linefeature(x0 y0 x1 y1 [...] :id idnum) -- create line feature
feature=areafeature(x0 y0 x1 y1 [...] :id idnum) -- create area feature
feature=nodefeature(x0 y0 :id idnum) -- create node feature

MAP FEATURE COMPUTATION COMMANDS

fltnum=polygonarea(areafeature) -- compute area of areafeature
fltnum=pointdistance(pointfeature1 pointfeature2) -- compute distance between point features

MAP FEATURE CLASS COMMANDS

numint=numfeatures(fclass) -- return number of features in feature class
feature=getfeature(fclass i) -- return copy of ith feature from feature class

MAP FEATURE CLASS EXPRESSION COMMANDS

fclass=attrsel(fclass expr_str) -- copy features where exprstr is true
fclass=shapesel(fclass shapefeature) -- copy features that spatially intersect a feature's shape
exprfc(fclass attribute exprstr) -- assign exprstr result to feature's attribute 

MAP FEATURE CLASS EXTENT AND CLIPPING COMMANDS

extentfc(fclass) -- return extents of feature class
fclass=cliprect(fclass x0_int y0_int x1_int y1_int) -- clip with rectangle
fclass=clippolyaminb(fclass areafeature_A) -- clip with polygon feature A minus B
fclass=clippolybmina(fclass areafeature_B) -- clip with polygon feature B minus A
fclass=clippolyaandb(fclass areafeature_A) -- clip with polygon feature A and B

MAP FEATURE CLASS EXPORT/IMPORT COMMANDS 

fclass=importfc(path_str) -- import a mapserv format feature class

exportfc(fclass [host_str port_int] :file path :paint :socket :bitmap) -- remote 
export in mapserv (or other) format
printfc(fclass :paint :file path) -- print in native mapserv format, with
	optional painting and/or saving to a file

paintfc(fclass) -- paint features based on gs expressions in painting table
painttbl(exprstr gsstr) -- add expression/gs pair to painting table
painttbl() -- dump painting table to stdout
painttbl(:reset) -- reset painting table

exportgr(fclass host_str port_int) -- remote export in drawtool format
exportgrgs(gs_str) -- default graphic state string for features
exportgrtr(tr_str) -- default transformer string for feature classes
printgr(fclass) -- print drawtool format to stdout


OTHER COMMANDS

run(filename) -- run commands from file
quit() -- quit this interpreter
exit() -- exit entire application

SEE ALSO  
	comterp, comdraw, vhclserv, utmviewer