Technical possibilities estabilished by WETLIVONIA for remote sensing, GIS and mapping applications

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Technical possibilities estabilished by
WETLIVONIA for remote sensing, GIS and mapping
applications

• Meelis Leivits

State Nature Conservation Centre Pärnu-Viljandi
region
Institute of ecology and earth sciences Department
of geography
GIS in the frame of WETLIVONIA 17. december 2007
Vana-Järve
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Contents

• GIS-instrumentation
• Permanent GPS reference station
• Roving GPS-instrument
• Software
• Data sources

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GPS reference station Nigula (Trimble NetRS)
58 00 56.27407 N 24 43
12.19042 E
Current options - DGPS real-time correction
messages in RTCM 2.3 format (217.159.210.1105018)
- Available via GPRS/data-call - 24/7
multi-client service using GPRSOn-demand options
if needed - RTKDGPS real-time correction
messages in formats like RTCM 2.x, CMR, Trimcom,
BinexFuture options - Server to store
observation-data for postprocessing
applicationsDGPS range typ. 80 km (up to 300
km)RTK range typ. 20 km (up to 35 km)
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DGPS

• Consists of simple L1 code correction -
  relatively distance independent
• 1 base-station within 300 km range usually
  guarantees accuracy lt 1m
• Estimably, using a base-station farther than 80
  km, the accuracy decreases according to 1 mm/km
  (1 mm per kilometer from base-station)
• For GIS GPS applications, accuracy between 0,3
  1 m is enough
• Real-time corrections are available as RTCM
  messages via GSM-network (GPRS or data-call)
• GPS handheld GSM-phone real-time DGPS
  instrument

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DGPS

• Roving instrument
• Trimble GeoXH handheld (range pole/backpack
  configurations)
• Zephyr external antenna (L1/L2 capable)
• ArcPad 7.0.1
• GPScorrect
• GPS Analyst extension for ArcGIS (post-processing
  and survey analysis)
• Bluetooth capable cellphone for RTCM reception
  via GPRS/data
• Base-station
• Trimble NetRS
• Zephyr Geodetic antenna

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DGPS local GPS reference-station

• Why?
• High-accuracy XYZ-GCP measurements for image
  orthorectification
• Accuracy-assessment of derived vegetation maps
  and classifications
• Precise groundwater level survey with leasehold
  RTK-instruments
• Ground control for LiDAR instrumentation
• Support for local development accuracy
  improvement in geodetic survey
• ... etc.

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Software

• ArcView 9.2
• 3D Analyst extension
• Spatial Analyst extension
• Feature Analyst extension
• LP360 extension
• ERDAS IMAGINE 9.1 Professional

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VLS Feature Analyst extension for ArcView

• Features
• Assisted and accelerated feature extraction (AFE)
  
• Multi-class and single-class feature collection
  with spatial context
• Change detection
• Batch processing
• Learning models
• Hierarchical learning for clutter removal
• Unsupervised classification
• Auto-attribution of 3D features using shape
  metrics

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VLS Feature Analyst extension for ArcView

• Benefits
• Automation Reduces labor costs for updating GIS
  databases
• Accuracy More accurate than hand digitizing on
  many features. More accurate than image
  processing on almost all fetures
• Simplicity User-friendly interface allows for
  unparalleled ease-of-use. Absolutely no image
  processing expertise required
• Innovation Department of Defense
• and NASA machine learning research
• producing spatial context, clutter
• removal, intelligent agent more.

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LP360 extension for ArcView

• LP360 bringing LiDAR to GIS
• Custom extension for ArcGIS
• Takes advantage of the LAS binary format
• Does not require 3D/Spatial analyst
• LP360 integrates LiDAR fast
• No time consuming processing, importing, or
  building
• Pyramids LAS files

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LP360 extension for ArcView

• LP360 visualization
• View points, TIN, and contours on the fly in
  ArcGIS
• Custom 3D Viewer
• Embedded Cross-section/profile viewer

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LP360 extension for ArcView

• LP360 large capacity
• Load thousands of files and billions of points
  simultaneously
• Pyramids LAS files
• LP360 - classification
• Classify LIDAR using GIS layers, LAS attributes,
  and elevation filters
• Detailed classification in profile window
• Clean batch classification spikes/noise

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Spatial Analyst extension for ArcView

• Raster data analysis package with high
  functionality
• Habitat suitability modelling

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3D Analyst extension for ArcView

• DEM interpolation
• Raster surface analysis
• 3D visualization

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Trimble GPS Analyst extension for ArcView

• Post-processing GPS-survey data
• Capable for H-Star post-processing (L1/L2 code
  and carrier corrections, multiple base-stations)
• Direct geodatabase updating functionality
  (check-in/check-out)

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ERDAS IMAGINE 9.1

• ERDAS IMAGINE, from Leica Geosystems Geospatial
  Imaging, is the leading imagery software package
• Raster-based software designed specifically to
  extract information from images
• Orthorectification, mosaicking, reprojection and
  image interpretation

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ERDAS IMAGINE 9.1

• Why?
• Image geometric correction for RS applications
• Orthophoto production
• Image preparation for next stage of analysis eg.
  in eCognition / Feature Analyst
• Supervised land cover classification

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Definiens eCognition 2.1

• Follows a new, object oriented approach in image
  analysis
• The concept of object-based analysis lies in
  classification of image objects which are
  produced by segmentating the source image
• Makes use of VHR missing gap between new
  generation remote sensing and GIS
• Current version Definiens Developer

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Definiens eCognition 2.1
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Data sources

• 110 000 basic map of North-Livonia
• North-Livonian elevation dataset
• Acquired QuickBird images
• Catalog ID 1010010005C18E0 18.07 2007 0,65/3
• Huge amounts of species-specific point-data
• ...

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North-Livonian elevation dataset

• DTM derived from 110 000 USSR topos
• DSM (SRTM)

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QuickBird

• Why?
• Main purpose to acquire uniform source data for
  N-L transboundary Ramsar wetland complex
• Documentation of current conditions on the whole
  area
• Uniform source data for RS mapping applications
• Fresh acquisitions to update the panchromatic
  SAP/SSP dataset (51, 86, 07)
• Apply contemporary methods of remote sensing in
  current nature conservation methodology
• Evaluate favourable conservation status of
  Natura2000 habitats

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• Available color ortho-photo coverage
• Top-left LV 199X 1m
• Top-right EE 1999 0,8m
• Top-right EE 2005 0,5m
• Bottom-left QuickBird 2007 0,65/3m

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More information http//www.lk.ee http//www.nigu
la.ee http//www.north-livonia.org http//wetlivon
ia.north-livonia.org

• Thank You!