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File Formats in GIS, 3D & Imagery and What to Treat them with...

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The letters refer to the format file extensions:
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File Formats "S" 

Extension Format name Can be Read by... Can be Written by...
S-57 S-57 Ed. 3.1  Caris Easy-Enc VTP No freeware that I know of writes this format: e-mail me if you know of something that does...
SAM Ami ProText Documents (images in)  PictView 1.0 command-line converter Columbus FastLook No freeware that I know of writes this format: e-mail me if you know of something that does...
SAM SAMNA Files  FastLook No freeware that I know of writes this format: e-mail me if you know of something that does...
SAM Sin 3D Object Converter 3D Object Converter
SAT ACIS 3D - Spatial Technology Inc., 3D Solid Modeling file format TurboCAD Columbus TurboCAD
SBM Sin 3D Object Converter 3D Object Converter
SC Kray /Triangles only/ 3D Object Converter 3D Object Converter
SC# Ilwis 2.x Vectors PCI FreeView No freeware that I know of writes this format: e-mail me if you know of something that does...
SC? ColoRix XnView PictView 1.0 command-line converter PictView 1.0 command-line converter
SC2 MSX 2 Screen XnView No freeware that I know of writes this format: e-mail me if you know of something that does...
SCENE Sculpt 3D/4D Scene 3D Object Converter 3D Object Converter
SCI ColoRix XnView No freeware that I know of writes this format: e-mail me if you know of something that does...
SCN TrueSpace Scene 3D Exploration No freeware that I know of writes this format: e-mail me if you know of something that does...
SCN POVLAB Scene 3D Object Converter 3D Object Converter
SCN Simple File Format [SFF] (Polygons only) 3D Object Converter 3D Object Converter
SCN Sced (without transformation) 3D Object Converter 3D Object Converter
SCR Sun Rasterfile XnView No freeware that I know of writes this format: e-mail me if you know of something that does...
SCR Z80 Screen Dump XnView Konverter Konverter
SCR ZX Spectrum Screen$
No freeware that I know of writes this format: e-mail me if you know of something that does...
SCRIPT Sculpt 3D Script  3D Object Converter 3D Object Converter
SCRIPT Sculpt 4D Script  3D Object Converter 3D Object Converter
SCT SciTex Continuous Tone
XnView Konverter No freeware that I know of writes this format: e-mail me if you know of something that does...
SCX Effect3D Studio 3D Object Converter 3D Object Converter
SD0, SD1, SD2 Dali Raw XnView No freeware that I know of writes this format: e-mail me if you know of something that does...
SDA ARENA Design  3D Object Converter 3D Object Converter
SDD Screen Capture PC Spy Konverter No freeware that I know of writes this format: e-mail me if you know of something that does...
SDF SDF 3D Object Converter 3D Object Converter
SDG Start Office Konverter No freeware that I know of writes this format: e-mail me if you know of something that does...
SDL Mapguide SDL file R2V R2V
SDML Spatial Data Modeling Language 3D Object Converter 3D Object Converter
SDN Solid Dinamics ASCII 3D Object Converter 3D Object Converter
SDTS Spatial Data Transfer Standard VTP No freeware that I know of writes this format: e-mail me if you know of something that does...
SDW AmiDraw Columbus FastLook No freeware that I know of writes this format: e-mail me if you know of something that does...
SEC DOQ Quarter Quad file
 
GlobalMapper No freeware that I know of writes this format: e-mail me if you know of something that does...
SEP CMYK Separated Images in TIFF 6.0 File Format PictView 1.0 command-line converter No freeware that I know of writes this format: e-mail me if you know of something that does...
SEQ Stad XnView No freeware that I know of writes this format: e-mail me if you know of something that does...
SES USGS DOQ
 
GlobalMapper No freeware that I know of writes this format: e-mail me if you know of something that does...
SF SilverScreen 3D Object Converter 3D Object Converter
SFF Structured FAX file IrfanView No freeware that I know of writes this format: e-mail me if you know of something that does...
SFW Seattle Film Works format
IrfanView XnView Konverter No freeware that I know of writes this format: e-mail me if you know of something that does...
SG Alias StyleGuide 3D Object Converter 3D Object Converter
SG# Ilwis 2.x Vectors PCI FreeView No freeware that I know of writes this format: e-mail me if you know of something that does...
SGI Silicon Graphics RGB
XnView SlowView PictView 1.0 command-line converter Konverter GIMP IrfanView XnView SlowView PictView 1.0 command-line converter Konverter STFImage Extractor GIMP
SHD Shade 3D Object Converter 3D Object Converter
SHP ESRI ArcView Shape File Arc Explorer Blue Marble Geographics Explorer ERDAS Map Sheets Express PCI FreeView R2V ShapeViz CartoMap Viewer GRASS Natural Resources Database 3D Object Converter VTP AccuGlobe GlobalMapper R2V GRASS Natural Resources Database VTP 3D Object Converter
SHP Neon Graphix 3D 3D Object Converter 3D Object Converter
SHP Darwinia 3D Object Converter 3D Object Converter
SHS Scrap Image Konverter No freeware that I know of writes this format: e-mail me if you know of something that does...
SHTML Hypertext Markup Language with Client Side Image Map
No freeware that I know of reads this format: e-mail me if you know of something that does...
SHW Corel Presentation Columbus No freeware that I know of writes this format: e-mail me if you know of something that does...
SHW Showcase Ray-Tracer (Tri/Rectangles only) 3D Object Converter 3D Object Converter
SI Softimage XnView XnView
SIA Silo 3D Object Converter 3D Object Converter
SID MrSID Image Document
 
ERDAS Map Sheets Express PCI FreeView ERDAS ViewFinder IrfanView GDAL OpenEV AccuGlobe GlobalMapper MrSID Photo Edition
SIM Aurora XnView No freeware that I know of writes this format: e-mail me if you know of something that does...
SIN sin 3D Object Converter 3D Object Converter
SIR Solitaire Image Recorder No freeware that I know of reads this format: e-mail me if you know of something that does... Konverter
SIT Spectrum No freeware that I know of reads this format: e-mail me if you know of something that does... Konverter
SJ1 Sega SJ-1 DIGIO XnView Konverter No freeware that I know of writes this format: e-mail me if you know of something that does...
SKB ZAP skin Konverter No freeware that I know of writes this format: e-mail me if you know of something that does...
SLC 3D Systems 3D Object Converter 3D Object Converter
SLD AutoCAD slide Konverter Columbus FastLook FastLook
SLDDRW SolidWorks FastLook No freeware that I know of writes this format: e-mail me if you know of something that does...
SLP PRO/Engineer render 3D Object Converter 3D Object Converter
SLP Render 3D Object Converter 3D Object Converter
SMD Half-Life Studio Model 3D Object Converter 3D Object Converter
SMF 4x4 Evolution 3D Object Converter 3D Object Converter
SMF Michael Garland’s SMF 3D Object Converter 3D Object Converter
SMP Ulead Gallery Konverter No freeware that I know of writes this format: e-mail me if you know of something that does...
SMPL Megahedron 3D Object Converter Crossroads 3D Object Converter
SMT SmartWare text file Columbus No freeware that I know of writes this format: e-mail me if you know of something that does...
SNA Z80 Spectrum Snapshot XnView Konverter Konverter
SND Encoded Audio format used by Sun and NeXT machines IrfanView No freeware that I know of writes this format: e-mail me if you know of something that does...
SNP Lotus Snapshot FastLook No freeware that I know of writes this format: e-mail me if you know of something that does...
SOF sof3D 3D Object Converter 3D Object Converter
SOL StlView 3D Object Converter 3D Object Converter
SP Spectrum (VGASPEC) No freeware that I know of reads this format: e-mail me if you know of something that does... Konverter
SPC Spectrum 512 (compressed) XnView Konverter No freeware that I know of writes this format: e-mail me if you know of something that does...
SPO SPOCK /triangles only/ 3D Object Converter 3D Object Converter
SPR Sprint Files  FastLook No freeware that I know of writes this format: e-mail me if you know of something that does...
SPS Canadian SPOTSAR PCI FreeView No freeware that I know of writes this format: e-mail me if you know of something that does...
SPS Spectrum 512 (smooshed) XnView No freeware that I know of writes this format: e-mail me if you know of something that does...
SPU Spectrum 512 XnView Konverter Konverter
SPV SpotView 4.0 PCI FreeView No freeware that I know of writes this format: e-mail me if you know of something that does...
SPX SPX file 3D Exploration 3D Object Converter 3D Object Converter
SQD Siemens SICAD PCI FreeView No freeware that I know of writes this format: e-mail me if you know of something that does...
SR Sun Rasterfile XnView Columbus No freeware that I know of writes this format: e-mail me if you know of something that does...
SRF GenSurf Game Map File GenSurf GenSurf
SRF SURFMODL 3D Object Converter 3D Object Converter
SRS Sun Rasterfile XnView Columbus No freeware that I know of writes this format: e-mail me if you know of something that does...
SS First Choice Spreadsheet FastLook No freeware that I know of writes this format: e-mail me if you know of something that does...
SSD SnagIt Studio Document Konverter Konverter
SSF Enable Spreadsheet File Columbus FastLook No freeware that I know of writes this format: e-mail me if you know of something that does...
SSI Generic Socet Set Image Format PCI FreeView No freeware that I know of writes this format: e-mail me if you know of something that does...
SSL Stratasys Genesys Xs (with slice/HPGL s.o.) 3D Object Converter 3D Object Converter
ST NeoPaint for DOS thumbnails PictView 1.0 command-line converter Konverter Columbus No freeware that I know of writes this format: e-mail me if you know of something that does...
ST4 SBIG CCD Camera ST-4 XnView Konverter No freeware that I know of writes this format: e-mail me if you know of something that does...
ST4, ST5, ST6, ST7, ST8 SBIG CCD Camera ST-X XnView No freeware that I know of writes this format: e-mail me if you know of something that does...
STEGANO Steganographic image
No freeware that I know of writes this format: e-mail me if you know of something that does...
STF (not a format so much as a file structure) SEDRIS Transmittal Format STFImage Extractor No freeware that I know of writes this format: e-mail me if you know of something that does...
STL</