NAME
d.vect.thematic - Displays thematic vectormap
SYNOPSIS
d.vect.thematic
d.vect.thematic help
d.vect.thematic [-ulmg] map=string type=string column=string themetype=string themecalc=string [breakpoints=string] [layer=integer] [icon=string] [size=float] [maxsize=float] [nint=integer] colorscheme=string [singlecolor=string] [startcolor=string] [endcolor=string] [monitor=string] [group=string] [where=string] [psmap=string]
Flags:
- -u
- Update color values to GRASSRGB column in attribute table
- -l
- Create graphic legend in display monitor
- -m
- Use math notation brackets in legend
- -g
- Save thematic map commands to group file for GIS Manager
Parameters:
- map=string
- Vector map to display thematically
- type=string
- Vector map type
- Options: area,point,centroid,line,boundary
- Default: area
- column=string
- Attribute column to use for thematic display (must be numeric)
- themetype=string
- Type of thematic display
- Options: graduated colors,graduated points
- Default: graduated colors
- themecalc=string
- Thematic divisions of data for display
- Options: interval,standard deviation,quartiles,custom breaks
- Default: interval
- breakpoints=string
- Break points for custom breaks option. Separate values by spaces. (0 10 20 30 ...)
- layer=integer
- Layer to use for thematic display
- Default: 1
- icon=string
- Vector point icon for point data
- Options: basic/box,basic/circle,basic/cross2,basic/diamond,basic/star,basic/cross1,basic/x
- Default: basic/circle
- size=float
- Vector point icon size for point data (minimum icon size for graduated points)
- Default: 5
- maxsize=float
- Maximum icon size for graduated points
- Default: 20
- nint=integer
- Number of classes for interval theme (integer)
- Default: 4
- colorscheme=string
- Color scheme for graduated color mapping (select 'single color' for graduated point display)
- Options: blue-red,red-blue,green-red,red-green,blue-green,green-blue,cyan-yellow,yellow-cyan,custom gradient,single color
- Default: blue-red
- singlecolor=string
- Color for graduated points map (grass named color or R:G:B triplet)
- Default: 255:0:0
- startcolor=string
- Beginning color for custom color gradient. Must be expressed as R:G:B triplet.
- Default: 255:0:0
- endcolor=string
- Ending color for custom color gradient. Must be expressed as R:G:B triplet
- Default: 0:0:255
- monitor=string
- Select display monitor for legend
- Options: x0,x1,x2,x3,x4,x5,x6
- Default: x1
- group=string
- Name of group file where thematic map commands will be saved
- where=string
- WHERE conditions of SQL statement without 'where' keyword
- psmap=string
- Root for the name of psmap instruction files to be in current directory (if not set, no psmap instruction files will be created)
DESCRIPTION
d.vect.thematic - Creates thematic maps from vectors of
all types and numeric attributes (stored in the data table connected to a vector
map). Thematic maps can be displayed by either a graduated color scheme (for
all vector types), or as graduated icon sizes (for point and centroid types).
The user selects the vector file to be mapped and attribute column from which
to derive mapping intervals, and (optionally) the layer for attribute data.
In thematic maps, the color or point size changes for each range of attribute
values. Value ranges for thematic mapping can be
set at regular intervals, standard deviation units on either
side of the mean, quartiles, or delimited by user-defined breakpoints. User-defined
breakpoints also can be piped into d.vect.thematic from standard input or
other external source.
There are options to define the color scheme (graduated
colors) and range of point sizes (graduated points) for thematic maps. A
simple text legend is printed. Optionally, a graphic legend can be drawn in
the selected display monitor. Thematic colors can be uploaded to a GRASSRGB
column for later display, and thematic map display commands can
be saved to a group file (*.dm) that can be opened, edited, and displayed in
the GIS Manager.
When the psmap option is set to 'name', two psmap instruction files are created in the current directory, one for the map ('name.psmap') and one for the legend ('name_legend.psmap'). The user can also enter a full path to have the files created elsewhere than the current directory.
(GRASS Shell Script)
ATTENTION
The algorithm currently uses the script v.univar.sh
to calculate basic descriptive statistics needed for thematic mapping (minimum,
maximum, mean, standard deviation, and quartiles).
SEE ALSO
d.vect,
v.univar.sh
AUTHORS
d.vect.thematic: Michael Barton, Arizona State University, Daniel Cavelo Aros,
Martin Landa, and Jachym Cepicky.
Last changed: $Date: 2005/09/19 11:34:41 $
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