Preparing worldview2 imagery for map updating projects : Aldjyl Aleibayiji (Iraq north Baghdad)‎ as a case study

Abstract EN

In the presented study, a WorldView2 WV2 satellite image has been prepared tobe used in map updating projects.

The performed operations can be classified intotwo categories, the first category includes pansharpening methods for creating anew 8- spectral bands of WV2 Imagery, each one of them has a 0.5-meter spatialresolution.

The Pansharpening technique has been implemented with fourdifferent approaches, i.

e.

(Principal Components PC, Wavelet Transform WT, Hyperspherical Color Space HCS, and High Pass Filtering HPF).

For these fourmethods and based on a visual comparison among the quality of the resultingimages (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 highsecurity situation of the study area, and the impossibility of using the GlobalPositioning System GPS and other surveying devices there, the Controlled ImageBased CIB of 1-meter resolution has been depended on as a source of referenceGround Control Points GCPs.

Initially, set GCPs and Check Points aredetermined on both the HCS Pansharpened image and the CIB image.

Formaintaining the linearity of the geometric distortion within WV2 original image, the 1st order polynomial transformation model has been selected to perform thegeometric correction process.

It is clearly concluded that the resulted Root MeanSquare Error RMSE of the geometric correction process is acceptable for a widerange of mapping applications.

Moreover, the resulting geometrically correctedpan-sharpened WV2 image can be utilized for increasing the interpretationcapability of the land features by giving more false color displaying options, andfinally supporting the related map updating projects