This paper compares several, text and image, lossless and lossy, compression techniques for regular gridded elevation data, such as DEMs. Sp compress and progcode, the best lossless methods average 2.0 bits per point on USGS DEMs, about half the size of gzipped files, and 6.2 bits per point on ETOPO5 samples. Lossy compression produces even smaller files at moderate error rates. Finally, some t...

Safe marine navigation in the Arctic is becoming more important with a growing interest in the region in recent years [1]. The United States Geological Survey (USGS) estimates there to be more than 90 billion barrels of undiscovered oil in the arctic [2]. With the summer Arctic sea ice extent having decreased by 50% since 1980 [3], this now opening waterway has given rise to serious interest in...

In this study, potential of electrical power generation estimates for geothermal resource fields with sufficient information available in Turkey are calculated. Estimates are obtained using the methodology based on volumetric reserve estimation approach introduced by USGS. A stochastic approach using Monte Carlo simulation technique is implemented to account for uncertainties involving some inp...

REAL-TIME ESTIMATES OF WIND DIRECTIONS. T.N. Titus, T.I. Michaels, A. Colaprete, H.H. Kieffer, Y. Langevin, S.L. Murchie, M. Vincendon, and the CRISM Science Team, USGS, 2255 N. Gemini Dr., Flagstaff, AZ 86001 USA ([email protected]), Southwest Research Institute, Boulder, CO, NASA Ames Research Center, Moffett Field, CA, Celestrial Reasonings, Genoa, NV., Institute d’Astrophysique Spatial (IAS),...

This paper describes the implementation of three methods for fitting surfaces: linear, quintic and stochastic. It uses qualitative (visual) and quantitative (statistical) criteria to compare the three approaches. The digital terrain model is based on a triangular irregular network (TIN) structure and the comparison is performed using a mathematically defined function and real data obtained from...

Edwards, R. Anderson, M. D. Dyar, M. Fisk, L. Thompson, P. Gasda, S. P. Schwenzer, W. Goetz, D. Blaney, J. Filiberto, R. C. Wiens, Space Research Centre, University of Leicester UK [email protected] USGS Astrogeology Science Center, Flagstaff, AZ, Mt. Holyoke College, Ma, Oregon State Univ., Planetary and Space Science Centre, University of New Brunswick, Can., Los Alamos National Lab., NM, Op...

Mittlefehldt, R. Gellert, K. E. Herkenhoff, R. V. Morris, B. C. Clark, B. A. Cohen, I. Fleischer, B. L. Jolliff, G. Klingelhöfer, D. W. Ming, R. A. Yingst and the Athena Science Team, NASA/JSC, Houston, TX USA ([email protected] ), Univ. Guelph, Guelph, ON CA, USGS, Flagstaff, AZ USA, SSI, Boulder, CO USA, NASA/MSFC, Huntsville, AL USA, Johannes Gutenberg-Univ., Mainz, DE, Washingto...

STRIKE SLIP AND COMPRESSIONAL FEATURES IN AN EXPANSIVE SATELLITE. M.A. Rodríguez Pascua, R. Pérez López, O. Prieto Ballesteros and J. S. Kargel. Facultad de CC. Experimentales y de la Salúd. Universidad San Pablo CEU, 28668 Boadilla del Monte. Madrid (España) e-mail: [email protected], Centro de Astrobiología, (CSIC/INTA). Torrejón de Ardoz, Madrid (España) e-mail: [email protected] T...