Creating a Query Interface for Client

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Creating a Query Interface for Client

• (Field worker/Mobile computer)

2
Purpose

• Provides a friendly front end for flexible access
  and retrieval of geospatial information to help
  naïve field worker
• Orientate
• navigate
• identify
• the specific target.

3
Hardware Tablet--Fujitsu Pencentra 200

• 129MHz RISC Processor
• 8" VGA Color Transmissive DSTN Display
• 640 x 480 resolution, 256 colors
• 32MB SDRAM
• 24MB ROM
• 16MB Flash
• Built-in 56K1 V.90 modem
• (226mm x 166mm x 33mm)
• 2 lbs. (900 grams) with battery
• Windows CE 2.11

4
Hardware PDA--Compaq iPAQ H3600 Pocket PC

• Operating System Windows Powered Pocket PC
• Processor 206 MHz Intel StrongARM 32 bit RISC
  Processor
• Display Type Color reflective thin film
  transistor (TFT) LCD
• Resolution 240 x 320
• Pixel Pitch .24 mm
• Viewable Image Size 2.26 x 3.02 inches
• RAM, ROM 32 MB, 16 MB
• Input Method Handwriting recognition, soft
  keyboard, voice record, inking
• Communications Port Interface with USB / Serial
  connectivity that connects via serial or USB
  cable
• Infrared Port Yes (115 Kbps)
• Speaker Microphone Yes
• Battery 950 mAh Lithium Polymer
• Dimensions 5.11" x 3.28" x .62"
• Weight 6.3 oz. including battery

5
Software

• Operating System Windows CE
• Browser Internet Explorer
• GIS ArcPad, MapInHand
• Database Oralce 8i light
• JDK Mirco Edition

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Limitation

• Computing capability
• Bandwidth and reliability of communication link
• Storage
• Screen
• Input method

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Query interface

• GUI interact friendly, understand easily, online
  help and tip
• Developing language
• Web-based Java or Javascript
• Application-based ArcPad SDKc and c
• MapInHand Java

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Query Definition

• Basic Information
• Citation Information Geo_Form_Presentation,
  Originator,
• Spatial DomainWest, East, North, South
• Attribute Key WordsTemporal, Place, Theme,
  Stratum
• Native Environment GIS, Operating system
• Scale Vector, Raster(time,spatial,band)

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Query Definition

• Data Representation Information
• Vector
• Rastor

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Query File Example of Simple Request(Satellite
image02-06-1999, Iowa state, Land use)

• lt?xml version"1.0"?gt ltDGXML version"1.0"gt
• ltREQUESTgt ltGET_DATAgt
• ltmetadatagt
• ltidinfogt
• ltspdomgtltboundinggtltwestbcgt -125 lt/westbcgt lteastbcgt
  25 lt/eastbcgt ltnorthbcgt -67 lt/northbcgt
  ltsourthbcgt 50 lt/sourthbcgtlt/boundinggtlt/spdomgt
• ltkeywordsgtltthemegtltthemektgt None lt/themektgt
  ltthemekeygt landuse lt/themekeygt
• lt/themegtltplacegtltplacektgt None lt/placektgt
  ltplacekeygt Iowa State lt/placekeygtlt/placegt
• lttemporalgtlttempktgt None lt/tempktgt lttempkeygt
  02-06-1999 lt/tempkeygtlt/temporalgtlt/keywordsgt
• ltscalegtltrasscalegtlttimeresgt 72 lt/timeresgtltspaceresgt
  30 lt/spaceresgtlt/rasscalegtlt/scalegt
• lt/idinfogt
• ltspdoinfogt
• rasterltrastinfogtltrasttypegt Pixel
  lt/rasttypegtlt/rastinfogt
• lt/spdoinfogt
• lt/metadatagt
• lt/GET_DATAgtlt/REQUESTgtlt/DGXMLgt

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Query Interface Example