The GMAP Procedure

Example 5: Creating Maps with Drill-down for the Web

Procedure Features:

CHORO statement options:

	DES=
	DISCRETE
	HTML=
	NAME=

BLOCK statement options:

	BLOCKSIZE=
	DES=
	MIDPOINTS=
	NAME=

ODS Features:

ODS HTML statement :

	BODY=
	CONTENTS=
	FRAME=
	NOGTITLE
	PATH=

Other Features:

BY statement

GOPTIONS statement

LEGEND statement

PATTERN statement

TITLE statement

Sample library member:

GR19N05

This example shows how to create a 2D choropleth map with simple drill-down functionality for the Web. When this map is displayed in a browser, you can select an area of the map and display additional information about the data.

The example explains how to use the ODS HTML statement and the HTML procedure options to create the drill-down. It shows how to

explicitly name the HTML files and open and close them throughout the program
use BY-group processing with ODS HTML, including storing multiple graphs in one file and incrementing anchor names, catalog entry names, and graphics file names
use the PATH= option to specify the destination for the HTML and GIF files created by the ODS HTML statement
use the NAME= option to name the graphics catalog entries
assign anchor names to the graphics output with the ANCHOR= option in the ODS HTML statement
add an HTML HREF string to a data set to define a link target
assign link targets with the HTML= procedure option
use DES= to control the text of the table of contents entry
suppress the titles in the GIF files and display them in the HTML file.

For more information, see ODS HTML Statement.

The example also illustrates other CHORO and BLOCK statement options.

The program produces one choro map that shows Environmental Protection Agency (EPA) regions and block maps of the states in each region. Each block map shows the number of hazardous waste sites for each state in the selected region. Browser View of Regional Map shows the map of the EPA regions.

Browser View of Regional Map

[IMAGE]

Browser View of Region 5 Block Map shows the block map that appears when you select Region 5 in the map.

Browser View of Region 5 Block Map

[IMAGE]

libname maps 'SAS-MAPS-library'; filename odsout 'path-to-Web-server-space';

ods listing close; goptions reset=global gunit=pct cback=white colors=(black blue green red) ftext=swiss htitle=6 htext=3.5;

data sites; length stcode $ 2; input region stcode $ sites; state=stfips(stcode); datalines; 1 AK 12 4 AL 7 4 AR 12 2 AZ 10 1 CA 90 1 CO 15 5 CT 15 5 DE 18 4 FL 52 4 GA 15 1 HI 4 3 IA 16 1 ID 8 3 IL 38 3 IN 30 3 KS 10 4 KY 16 4 LA 15 5 MA 30 4 MD 13 5 ME 12 3 MI 72 3 MN 30 3 MO 22 4 MS 1 1 MT 8 4 NC 22 3 ND 0 3 NE 10 5 NH 18 5 NJ 105 2 NM 9 1 NV 1 5 NY 78 3 OH 34 2 OK 10 1 OR 10 5 PA 100 5 RI 12 4 SC 26 3 SD 2 4 TN 14 2 TX 26 1 UT 12 4 VA 25 5 VT 8 1 WA 49 3 WI 40 5 WV 6 1 WY 3 ;

data newsites; length regiondrill $40; set sites; if region=1 then regiondrill='HREF="hazsite_statebody.html#Region1"'; if region=2 then regiondrill='HREF="hazsite_statebody.html#Region2"'; if region=3 then regiondrill='HREF="hazsite_statebody.html#Region3"'; if region=4 then regiondrill='HREF="hazsite_statebody.html#Region4"'; if region=5 then regiondrill='HREF="hazsite_statebody.html#Region5"'; run;

goptions device=gif transparency;

ods html body='hazsite_mapbody.html' contents='hazsite_contents.html' frame='hazsite_frame.html' nogtitle path=odsout;

title1 'Hazardous Waste Sites in EPA Regions (1997)'; footnote1 h=3 j=l 'click on a map region' j=r 'EPAMAP ';

pattern1 value=msolid color=blue; pattern2 value=msolid color=green; pattern3 value=msolid color=red; pattern4 value=msolid color=lime; pattern5 value=msolid color=cyan;

proc gmap map=maps.us data=newsites; id state; choro region / discrete html=regiondrill coutline=black nolegend des='EPA Regional Map' name='epamap'; run; quit;

ods html body='hazsite_statebody.html' anchor='Region1' gtitle path=odsout;

goptions notransparency border;

proc sort data=newsites; by region; run;

legend1 shape=bar(3,4) label=('Number of Sites' position=(top center)) value=(j=l '0-24' '25-49' '50-74' '75-99' 'over 100') frame;

pattern1 value=ms color=gray;

pattern2 value=solid color=lipk; pattern3 value=solid color=cyan; pattern4 value=solid color=green; pattern5 value=solid color=blue; pattern6 value=solid color=red;

options nobyline; title1 'Wastes Sites per State in Region #byval(region)'; footnote1 h=3 j=r 'SITEMAP ';

proc gmap map=maps.us data=newsites; by region; id state; block sites / midpoints=(12 37 62 87 112) legend=legend1 shape=cylinder blocksize=4 coutline=black des='State Maps' name='states01'; run; quit;

ods html close; ods listing;

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