[分享]Arc/Info Binary Coverage 格式分析 很详细

<P>非常感谢<EM>Daniel Morissette的研究：）</EM></P>
<P>地址：</P>
<P><a href="http://avce00.maptools.org/docs/v7_bin_cover.html" target="_blank" >http://avce00.maptools.org/docs/v7_bin_cover.html</A></P>

<H2>TABLE OF CONTENTS</H2>
<P>
<UL>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#INTRO" target="_blank" >1. Introduction</A>
<UL>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#VARIANTS" target="_blank" >1.1 PC Arc/Info and other variants
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#BYTE_ORDER" target="_blank" >1.2 Byte Ordering</A> </LI></UL>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#ARC_COVER" target="_blank" >2. ARC Coverage Files</A>
<UL>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#ARC" target="_blank" >2.1 File Header</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#ARC" target="_blank" >2.2 Index Files</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#ARC" target="_blank" >2.3 ARC</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#PAL" target="_blank" >2.4 PAL</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#LAB" target="_blank" >2.5 LAB</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#CNT" target="_blank" >2.6 CNT</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#PRJ" target="_blank" >2.7 PRJ</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#LOG" target="_blank" >2.8 LOG</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#TOL" target="_blank" >2.9 TOL</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#TX6" target="_blank" >2.10 TX6/TX7 Annotations</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#TXT" target="_blank" >2.11 TXT Annotations</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#RXP" target="_blank" >2.12 RXP - Specific to Region coverages</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#RPL" target="_blank" >2.13 RPL - Specific to Region coverages</A> </LI></UL>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#INFO_FILES" target="_blank" >3. The Attribute Files</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#INFO_V7" target="_blank" >3.1 INFO Files in V7.x Coverages</A>
<UL>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#ARC.DIR" target="_blank" >3.1.1 INFO/ARC.DIR</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#ARC.DAT" target="_blank" >3.1.2 INFO/ARC####.DAT</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#ARC.NIT" target="_blank" >3.1.3 INFO/ARC####.NIT</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#INFO_DATA" target="_blank" >3.1.4 Table Data files (.adf, ...)</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#TABLE_NAME" target="_blank" >3.1.5 Name and location of TABLE DATA files</A> </LI></UL>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#INFO_WEIRD" target="_blank" >3.2 INFO Files in "Weird" Coverages</A>
<LI><a href="http://avce00.maptools.org/docs/v7_bin_cover.html#DBF_PC" target="_blank" >3.3 DBF Files in PC Coverages</A> </LI></UL>
<P>
<P>
<H2><A>1. INTRODUCTION</A></H2>
<P>This is an attempt to document the binary vector coverage files used by Arc/Info V7.x for Unix and Windows NT. Since the coverage file's format is not documented by ESRI, this document is mainly based on the analysis of binary dumps of the files... this implies that the information may be incomplete (or even inaccurate!) in some cases. As for any document of this type, it is expected that it will evolve as we learn more.
<P>Another great source of information to help understanding the format would be the (world famous) "ANALYSIS OF ARC EXPORT FILE FORMAT FOR ARC/INFO (REV 6.1.1)" (from which I "borrowed" some extracts ;-)... you can find it at:
<P>
<CENTER><a href="http://www.geocities.com/~vmushinskiy/fformats/files/e00.txt" target="_blank" >http://www.geocities.com/~vmushinskiy/fformats/files/e00.txt</A> </CENTER>
<P>Since the contents of the E00 and binary coverage files are very close, the current document will often refer you to an <a href="http://avce00.maptools.org/docs/v7_e00_cover.html" target="_blank" >updated version of the E00 Analysis Document mentioned above</A> instead of duplicating the details about a specific file.
<P>The first section of this document covers the coverage vector files (ARC, PAL, CNT, LAB, ...) and the second section covers the INFO files.
<P>
<P>
<H3><A>1.1 PC ARC/INFO COVERAGES AND VARIANTS</A></H3>
<P>Even though this document covers mainly Arc/Info V7.x for Unix coverages, some notes have been included to document the differences between the V7.x Unix coverages and some variants.
<P>In each section, the Unix V7.x coverage format is always discussed first (sometimes referred to as <B>"V7 Coverages"</B>), and when applicable, the following variants will also be discussed:
<P>
<UL>
<LI><B>"PC Coverages"</B>: Coverages produced by the 16 version of Arc/Info for PCs (DOS or Windows?).
<br>
<LI><B>"Weird Coverages"</B>: Refers to some kind of hybrid between V7 and PC coverages. Probably produced by an early version of Arc/Info for Unix. <BR>These coverages use the same byte ordering as V7 Coverages.<BR>The attribute files in these coverages are located in an INFO directory and have names similar (but not identical) to V7 Coverages. The coverage files (ARC, PAL, etc.) are named the same way as in PC Coverages, but they do not have the first 256 bytes header of PC Coverages and they are not padded to a multiple of 256 bytes at the end.<BR>The name "Weird coverages" refers to our reaction when we saw those coverages for the first time. <CODE>;-)</CODE> </LI></UL>

支持！好东西啊！

god  看不懂   类似白皮