Document Type : Research Paper


Civil Engineering Dept., University of Technology-Iraq, Alsina’a street, 10066 Baghdad, Iraq.


In the presented study, a WorldView2 WV2 satellite image has been prepared to be used in map updating projects. The performed operations can be classified into two categories, the first category includes pansharpening methods for creating a new 8- spectral bands of WV2 Imagery, each one of them has a 0.5-meter spatial resolution. The Pansharpening technique has been implemented with four different approaches, i.e. (Principal Components PC, Wavelet Transform WT, Hyperspherical Color Space HCS, and High Pass Filtering HPF). For these four methods and based on a visual comparison among the quality of the resulting images (with respect to the original Multi-spectral Worldview2 MS-WV2 image), the HCS image has been determined as the best one of them. Because of the high-security situation of the study area, and the impossibility of using the Global Positioning System GPS and other surveying devices there, the Controlled Image Based CIB of 1-meter resolution has been depended on as a source of reference Ground Control Points GCPs. Initially, set GCPs and Check Points are determined on both the HCS Pansharpened image and the CIB image. For maintaining the linearity of the geometric distortion within WV2 original image, the 1st order polynomial transformation model has been selected to perform the geometric correction process. It is clearly concluded that the resulted Root Mean Square Error RMSE of the geometric correction process is acceptable for a wide range of mapping applications. Moreover, the resulting geometrically corrected pan-sharpened WV2 image can be utilized for increasing the interpretation capability of the land features by giving more false color displaying options, and finally supporting the related map updating projects.


  • Pan sharpening algorithms framework is proposed to improve or enhance the spatial clarity of very high resolution  (VHR) satellite imagery.
  • Pan sharpening is a process of merging high-resolution panchromatic and lower resolution multispectral imagery to create a single high-resolution color image.
  • The Controlled Image Base CIB is used as a source of the Ground Control Points GCPs
  • The CIB is seamless database of geometrically corrected images that have been corrected with orthorectification method.
  • Pan sharpening methods can be applied using GIS basic functions for Image Map Production.


Main Subjects

[1] DigitalGlobe, Inc. 2010, Radiometric Use of WorldView-2 Imagery, Technical Note, Release date: 1 November (2010).
[2] R. Zhang, M. Zeng and J.  Chen, Study on geological structural interpretation based onWorldview-2 remote sensing image and its implementation. Procedia Environ, Sci. (2011) 653–659.
[3] S.D.Jawak and A.J.Luis, A spectral index ratio-based Antarctic land-cover mapping using hyperspatial 8-band Worldview-2 imagery, Polar Sci. (2013) 18–38.
[4] O.Mutanga, E. Adam and M.A. Cho, High density biomass estimation for wetland vegetation using Worldview-2 imagery and random forest regression algorithm, Int. J. Appl. Earth Obs. Geoinf. (2012) 399–406.
[5] C. Pohl and J.L Van Genderen, Multisensor image fusion in remote sensing: concepts, methods and application, International Journal of Remote Sensing, 99 (1998) 823-854.
[6] N. Ouarab, M. Achir, N. Khettal and Y. Smara, Spatial enhancement of satellite images using data fusion algorithms in the wavelet domain, Proceedings of the IEEE/ISPRS joint workshop on remote sensing and data fusion over urban areas, (2001) 293–298.
[7] V. Vijayaraj, A Quantitative Analysis of Pansharpened Images, MSc. Thesis, Mississippi State University, Mississippi, (2004).
[8] ArcGIS Desktop10.7.1 Software Package, ESRI Inc., (2019).
[9] Intergraph Corporation; ERDDAS Field Guide; (2013).
[10] Christine Pohl John, van Genderen, Remote Sensing Image Fusion: A Practical Guide, (2017) by Taylor & Francis Group, LLC.
[12] C. Padwick, M. Deskevich, F. Pacifici, and S. Smallwood, WorldView-2 Pan-Sharpening, ASPRS 2010 Annual Conference, San Diego, California. April (2010) 26-30.
[13] A.  Ghosh, Assessment of pan-sharpened very high-resolution WorldView-2 images, Article in International Journal of Remote Sensing · December (2013).
[14] T. M.  Lillesand and R. W.Kiefer, Remote Sensing and Image Interpretation, Fourth Edition, John Wiley and Sons Inc, Singapore, (2003).
[15] P. R. Wolf and B. A. Dewitt, Elements of Photogrammetry with Applications in GIS, Third Edition, McGraw Hill, USA, (2000).
[16] W. K. Pratt, Digital Image Processing, John Wiley and Sons, New York (1978).