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The LAS File Format Contains a Header Block, Variable Length
LAS Specification Version 1.2 Approved by ASPRS Board 09/02/2008 LAS 1.2 1 LAS FORMAT VERSION 1.2: This document reflects the second revision of the LAS format specification since its initial version 1.0 release. Version 1.2 retains the same structure as version 1.1 including identical field alignment. LAS 1.1 file Input/Output (I/O) libraries will require slight modifications in order to be compliant with this revision. A LAS 1.1 Reader will read LAS 1.2 (without the new enhancements) with no modifications. A detailed change document that provides both an overview of the changes in the specification as well as the motivation behind each change is available from the ASPRS website in the LIDAR committee section. The additions of LAS 1.2 include: • GPS Absolute Time (as well as GPS Week Time) – LAS 1.0 and LAS 1.1 specified GPS “Week Time” only. This meant that GPS time stamps “rolled over” at midnight on Saturday. This makes processing of LIDAR flight lines that span the time reset difficult. LAS 1.2 allows both GPS Week Time and Absolute GPS Time (POSIX) stamps to be used. • Support for ancillary image data on a per point basis. You can now specify Red, Green, Blue image data on a point by point basis. This is encapsulated in two new point record types (type 2 and type 3). LAS FORMAT DEFINITION: The LAS file is intended to contain LIDAR point data records. The data will generally be put into this format from software (e.g. -
Key Aspects in 3D File Format Conversions
Key Aspects in 3D File Format Conversions Kenton McHenry and Peter Bajcsy Image Spatial Data Analysis Group, NCSA Presented by: Peter Bajcsy National Center for Supercomputing Applications University of Illinois at Urbana-Champaign Outline • Introduction • What do we know about 3D file formats? • Basic Archival Questions • Is there an optimal format to convert to? • Can we quantify 3D noise introduced during conversions? • NCSA Polyglot to Support Archival Processes • Automation of File Format Conversions • Quality of File Format Conversions • Scalability with Volume • Conclusions • Live demonstration Introduction Introduction to 3D File Format Reality *.k3d *.pdf (*.prc, *.u3d) *.ma, *.mb, *.mp *.w3d *.lwo *.c4d *.dwg *.blend *.iam *.max, *.3ds Introduction: Our Survey about 3D Content • Q: How Many 3D File Formats Exist? • A: We have found more than 140 3D file formats. Many are proprietary file formats. Many are extremely complex (1,200 and more pages of specifications). • Q: How Many Software Packages Support 3D File Format Import, Export and Display? • A: We have documented about 16 software packages. There are many more. Most of them are proprietary/closed source code. Many contain incomplete support of file specifications. Examples of Formats and Stored Content Format Geometry Appearance Scene Animation Faceted Parametric CSG B-Rep Color Material Texture Bump Lights Views Trans. Groups 3ds √ √ √ √ √ √ √ √ √ igs √ √ √ √ √ √ √ lwo √ √ √ √ √ √ obj √ √ √ √ √ √ √ ply √ √ √ √ √ stp √ √ √ √ √ √ wrl √ √ √ √ √ √ √ √ √ √ √ u3d √ √ √ √ √ -
Fileweaver: Flexible File Management with Automatic Dependency Tracking Julien Gori Han L
FileWeaver: Flexible File Management with Automatic Dependency Tracking Julien Gori Han L. Han Michel Beaudouin-Lafon Université Paris-Saclay, CNRS, Inria, Laboratoire de Recherche en Informatique F-91400 Orsay, France {jgori, han.han, mbl}@lri.fr ABSTRACT Specialized tools typically load and save information in pro- Knowledge management and sharing involves a variety of spe- prietary and/or binary data formats, such as Matlab1 .mat cialized but isolated software tools, tied together by the files files or SPSS2 .sav files. Knowledge workers have to rely on that these tools use and produce. We interviewed 23 scientists standardized exchange file formats and file format converters and found that they all had difficulties using the file system to communicate information from one application to the other, to keep track of, re-find and maintain consistency among re- leading to a multiplication of files. lated but distributed information. We introduce FileWeaver, a system that automatically detects dependencies among files Moreover, as exemplified by Guo’s “typical” workflow of a without explicit user action, tracks their history, and lets users data scientist [8, Fig. 2.1], knowledge workers’ practices often interact directly with the graphs representing these dependen- consist of several iterations of exploratory, production and cies and version history. Changes to a file can trigger recipes, dissemination phases, in which workers create copies of files either automatically or under user control, to keep the file con- to save their work, file revisions, e.g. to revise the logic of sistent with its dependants. Users can merge variants of a file, their code, and file variants, e.g. -
Common Object File Format (COFF)
Application Report SPRAAO8–April 2009 Common Object File Format ..................................................................................................................................................... ABSTRACT The assembler and link step create object files in common object file format (COFF). COFF is an implementation of an object file format of the same name that was developed by AT&T for use on UNIX-based systems. This format encourages modular programming and provides powerful and flexible methods for managing code segments and target system memory. This appendix contains technical details about the Texas Instruments COFF object file structure. Much of this information pertains to the symbolic debugging information that is produced by the C compiler. The purpose of this application note is to provide supplementary information on the internal format of COFF object files. Topic .................................................................................................. Page 1 COFF File Structure .................................................................... 2 2 File Header Structure .................................................................. 4 3 Optional File Header Format ........................................................ 5 4 Section Header Structure............................................................. 5 5 Structuring Relocation Information ............................................... 7 6 Symbol Table Structure and Content........................................... 11 SPRAAO8–April 2009 -
Image Formats
Image Formats Ioannis Rekleitis Many different file formats • JPEG/JFIF • Exif • JPEG 2000 • BMP • GIF • WebP • PNG • HDR raster formats • TIFF • HEIF • PPM, PGM, PBM, • BAT and PNM • BPG CSCE 590: Introduction to Image Processing https://en.wikipedia.org/wiki/Image_file_formats 2 Many different file formats • JPEG/JFIF (Joint Photographic Experts Group) is a lossy compression method; JPEG- compressed images are usually stored in the JFIF (JPEG File Interchange Format) >ile format. The JPEG/JFIF >ilename extension is JPG or JPEG. Nearly every digital camera can save images in the JPEG/JFIF format, which supports eight-bit grayscale images and 24-bit color images (eight bits each for red, green, and blue). JPEG applies lossy compression to images, which can result in a signi>icant reduction of the >ile size. Applications can determine the degree of compression to apply, and the amount of compression affects the visual quality of the result. When not too great, the compression does not noticeably affect or detract from the image's quality, but JPEG iles suffer generational degradation when repeatedly edited and saved. (JPEG also provides lossless image storage, but the lossless version is not widely supported.) • JPEG 2000 is a compression standard enabling both lossless and lossy storage. The compression methods used are different from the ones in standard JFIF/JPEG; they improve quality and compression ratios, but also require more computational power to process. JPEG 2000 also adds features that are missing in JPEG. It is not nearly as common as JPEG, but it is used currently in professional movie editing and distribution (some digital cinemas, for example, use JPEG 2000 for individual movie frames). -
File Format Guidelines for Management and Long-Term Retention of Electronic Records
FILE FORMAT GUIDELINES FOR MANAGEMENT AND LONG-TERM RETENTION OF ELECTRONIC RECORDS 9/10/2012 State Archives of North Carolina File Format Guidelines for Management and Long-Term Retention of Electronic records Table of Contents 1. GUIDELINES AND RECOMMENDATIONS .................................................................................. 3 2. DESCRIPTION OF FORMATS RECOMMENDED FOR LONG-TERM RETENTION ......................... 7 2.1 Word Processing Documents ...................................................................................................................... 7 2.1.1 PDF/A-1a (.pdf) (ISO 19005-1 compliant PDF/A) ........................................................................ 7 2.1.2 OpenDocument Text (.odt) ................................................................................................................... 3 2.1.3 Special Note on Google Docs™ .......................................................................................................... 4 2.2 Plain Text Documents ................................................................................................................................... 5 2.2.1 Plain Text (.txt) US-ASCII or UTF-8 encoding ................................................................................... 6 2.2.2 Comma-separated file (.csv) US-ASCII or UTF-8 encoding ........................................................... 7 2.2.3 Tab-delimited file (.txt) US-ASCII or UTF-8 encoding .................................................................... 8 2.3 -
File Format Identification and Validation Tools Roy Lechich 2/2007 Integrated Library & Technology Systems Yale University Library
File Format Identification and Validation Tools Roy Lechich 2/2007 Integrated Library & Technology Systems Yale University Library File Types and Formats With the increasing uses for software, many of them involving storage of different kinds of data, numerous types of computer files have emerged. In fact , it is virtually impossible to list every type of computer file, because: • some file types are general while others are very specific • some file types are widely used while others may exist only for the use of one organization or individual • the specfications for some file types are proprietary while others are open • new types are always being created. A file type often has an associated explicit format specification -- a formal declaration of how information is to be encoded in a file to qualify as being of that "type". The more widely used and specific a file type is, the more likely that it will have a corresponding format specification, with its formal declaration existing as a "reference implementation" and usually maintained by a standards organization. Key file use concepts: • different types are typically created, accessed and modified by some set of programs or tools – this can range from very general (e.g. text files able to be read and written by operating system tools) to very specific (e.g. a jpeg 2000 requiring a very specific program to create or view the image). • users of a specific file will do so using these appropriate programs/tools File Type Identification vs. File Format Validation Most people typically are not overly concerned about file formats and related issues, because a) they are happily able to create and use their data with their sets of applications and tools, and b) they do not need to think about the implications of the passage of time upon their data and their ability to continue to use it. -
Atlantis Core File
Available for CEREC SW, inLab CAD SW, 3Shape, Dental Wings, DWOS Lava Edition, exocad, Open design software Atlantis® Atlantis® Core File – User guide Atlantis® CONTENTS This user guide for the Atlantis Core File is valid for: • CEREC SW 4.4.4 or higher • inLab CAD SW 1 6.0 or higher • exocad DentalCAD • 3Shape DS 2014/2015 • Dental Wings DWOS 4.0 • DWOS Lava Edition • Design software that accepts open STL file format Description of Atlantis Core File 4 Creating a new Atlantis order 5 Downloading Atlantis Core File 6 Importing Atlantis Core File into CEREC SW 7 Importing Atlantis Core File into inLab CAD SW 1 1 Adding the screw access channel 1 6 Importing Atlantis Core File into exocad DentalCAD 1 8 Adding the screw access channel 2 1 Importing Atlantis Core File into 3Shape 24 Adding the screw access channel 26 Importing Atlantis Core File into Dental Wings or DWOS Lava Edition 28 Adding the screw access channel 30 Importing Atlantis Core File into open design software 35 Appendix A: Adding more restorations – CEREC SW 36 Appendix B: Failed to process your Atlantis Core File order 38 Appendix C: Designing pontic on Atlantis Core File 39 Appendix D: Designing pontic with 3Shape 4 1 Appendix E: Later order 42 All trademarks and company names are the property of their respective owners. All products may not be regulatory released in all markets. Please contact the local Dentsply Sirona Implants sales office for current product assortment and availability. To improve readability for our customers, Dentsply Sirona does not use ® or ™ in body copy. -
Wing Helper 1.1 Tutorial Document Version 1.1
Wing Helper 1.1 Tutorial Document Version 1.1 (c) 2015, 2016 by Wing Helper e.U., all rights reserved Wing Helper 1.1 Table of Contents 1 Introduction......................................................................................................................................5 2 New Functions and Improvements in Version 1.1............................................................................6 3 Features.............................................................................................................................................7 4 Usage................................................................................................................................................9 4.1 Registering Wing Helper...........................................................................................................9 4.2 Main Window.........................................................................................................................10 4.3 Panel Edit Mode......................................................................................................................11 4.3.1 Base Data........................................................................................................................12 4.3.2 Ribs.................................................................................................................................14 4.4 Spars........................................................................................................................................15 4.4.1 -
Apple File System Reference
Apple File System Reference Developer Contents About Apple File System 7 General-Purpose Types 9 paddr_t .................................................. 9 prange_t ................................................. 9 uuid_t ................................................... 9 Objects 10 obj_phys_t ................................................ 10 Supporting Data Types ........................................... 11 Object Identifier Constants ......................................... 12 Object Type Masks ............................................. 13 Object Types ................................................ 14 Object Type Flags .............................................. 20 EFI Jumpstart 22 Booting from an Apple File System Partition ................................. 22 nx_efi_jumpstart_t ........................................... 24 Partition UUIDs ............................................... 25 Container 26 Mounting an Apple File System Partition ................................... 26 nx_superblock_t ............................................. 27 Container Flags ............................................... 36 Optional Container Feature Flags ...................................... 37 Read-Only Compatible Container Feature Flags ............................... 38 Incompatible Container Feature Flags .................................... 38 Block and Container Sizes .......................................... 39 nx_counter_id_t ............................................. 39 checkpoint_mapping_t ........................................ -
Best Practices for File Naming and Organizing
Smithsonian Data Management Best Practices Naming and Organizing Files Name and organize your files in a way that indicates their contents and specifies any relationships to other files. The five precepts of file naming and organization: Have a distinctive, human-readable name that gives an indication of the content. Follow a consistent pattern that is machine-friendly. Organize files into directories (when necessary) that follow a consistent pattern. Avoid repetition of semantic elements among file and directory names. Have a file extension that matches the file format (no changing extensions!) FILE NAMING A file name should enable disambiguation among similar files and, for large numbers of files that make up a dataset, facilitate sorting and reviewing. Ideally, file names should be unique. Keep in mind that files can be moved and, without the inherited folder structure, important descriptive information about the contents could be lost. Consider whether a filename would be meaningful outside of your chosen directory structure, and if not, how important the loss of that context would be, e.g., if the date a file was created is important, include it in the filename rather than just the directory name. To provide a description of the file contents in the name itself, you should include elements such as: a date, or at least the year, the contents of the file were created, in the YYYYMMDD format (four digit year, two digit month, two digit day.) o start the filename with the date if it is important to store or sort files in chronological order. the project name, or documented abbreviation for the project. -
Tinkertool System 6 Reference Manual Ii
Documentation 0632-1969/2 TinkerTool System 6 Reference Manual ii Version 6.99, July 21, 2021. US-English edition. MBS Documentation 0632-1969/2 © Copyright 2003 – 2021 by Marcel Bresink Software-Systeme Marcel Bresink Software-Systeme Ringstr. 21 56630 Kretz Germany All rights reserved. No part of this publication may be redistributed, translated in other languages, or transmitted, in any form or by any means, electronic, mechanical, recording, or otherwise, without the prior written permission of the publisher. This publication may contain examples of data used in daily business operations. To illustrate them as completely as possible, the examples include the names of individuals, companies, brands, and products. All of these names are fictitious and any similarity to the names and addresses used by an actual business enterprise is entirely coincidental. This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in new editions of the publication. The publisher may make improvements and/or changes in the product(s) and/or the program(s) described in this publication at any time without notice. Make sure that you are using the correct edition of the publication for the level of the product. The version number can be found at the top of this page. Apple, macOS, iCloud, and FireWire are registered trademarks of Apple Inc. Intel is a registered trademark of Intel Corporation. UNIX is a registered trademark of The Open Group. Broadcom is a registered trademark of Broadcom, Inc. Trademarks or service marks are used for identification purposes only.