REFLECTION OF NEW GEODETIC DATUM AND MAP PROJECTION INTRODUCTION ON ORTHOPHOTO PRODUCTION PROCESS

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REFLECTION OF NEW GEODETIC DATUM AND MAP
PROJECTION INTRODUCTION ON ORTHOPHOTO PRODUCTION
PROCESS
Sinia Hofer, Ivana imat, Ljerka
Raic Department of Photogrammetry and Remote
Sensing, State Geodetic Administration,
Lastovska 23, Zagreb, CROATIA e-mail
sinisa.hofer_at_dgu.hr, ivana.simat_at_dgu.hr,
ljerka.rasic_at_dgu.hr
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Introduction - NSDI

• Law on State Survey and the Real Estate Cadastre
  in 2007
• One of the main spatial data for establishment of
  NSDI is digital orthophoto in the scale 1 5000
  (DOP5)
• Production of 5400 DOP5 sheets within Land Parcel
  Identification System (LPIS) project

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Historical geodetic datum and cartographic map
projection

• Bessel ellipsoid
• Gauss-Krüger conform transverse cylindrical
  projection of 3 degree meridian zone
• 2 zones 15ºE and 18ºE mean meridian
• Trigonometric sections 22,515 km

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Comparison of DOP5 production
Till 2008
Nowdays
transformation
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• Discordance between 2 neighboring DOP5 sheets due
  to inhomogeneous CSCS

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New geodetic datum and map projection

• ETRS89 GRS80 ellipsoid
• Transverse Mercator projection
• 1 coordinate system mean meridian 1630E
• Linear scale on mean meridian 0,9999
• x, y ? N, E (ISO 19111)

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New sheet division

• Section dimensions 600600 km
• 125000 ? 1015 km
• ? 1 5000
• 32 km
• DOP5 sheet dimensions 7050 cm
• 10981 DOP5 sheets covering Croatian territory

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Conclusion

• 2004 - Decision on the Establishment of Official
  Geodetic Datum and Planar Map Projections of the
  Republic of Croatia
• New geodetic reference system will satisfy
  scientific, technological and economical national
  international needs of Croatia on her way to EU
• SGA recognized LPIS project as opportunity to
  start production of DOP5 in new reference system
• OUTCOMES homogenous spatial data
• FURTHER CHALLANGE transformation of former
  background into new datum, with the accent on DTM
  data

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Thank you for your attention !