<P>4.2 .ACODE</P>
<P>The .ACODE (Arc Lookup Table) contains seven fields whose item<BR>names are the same (except the -ID) as that in the ADS files<BR>documentation.  However, additional items should be able to be be<BR>added as desired, after the LABEL item.</P>
<P>An example of an actual .ACODE section follows:</P>
<P>LANDLICP.ACODE                       8   8  80         7<BR>LANDLICP-ID       4-1   14-1   8-1 50-1  -1  -1-1                   1-<BR>XLABEL            4-1   54-1   8 2 60-1  -1  -1-1                   2-<BR>YLABEL            4-1   94-1   8 2 60-1  -1  -1-1                   3-<BR>SIZE              4-1  134-1   8 2 60-1  -1  -1-1                   4-<BR>ANGLE             4-1  174-1   8 2 60-1  -1  -1-1                   5-<BR>SZLBL             4-1  214-1   4-1 50-1  -1  -1-1                   6-<BR>IFONTF            4-1  254-1   4-1 50-1  -1  -1-1                   7-<BR>LABEL            52-1  294-1  52-1 20-1  -1  -1-1                   8-<BR>          1 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00          0<BR>        0<BR>          2 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00          0<BR>        0<BR>          3 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00          0<BR>        0<BR>          4 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00          0<BR>        0<BR>          5 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00          0<BR>        0<BR>          6 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00          0<BR>        0<BR>          7 0.0000000E+00 0.0000000E+00 0.0000000E+00 0.0000000E+00          0<BR>        0</P>
<P>4.3 .BND</P>
<P>The .BND (Coverage Min/Max Coordinates) table contains four<BR>fields whose item names are self-explanatory.</P>
<P>An example of an actual .BND section follows:</P>
<P>LANDLICP.BND                    XX   4   4  16         1<BR>XMIN              4-1   14-1  12 3 60-1  -1  -1-1                   1-<BR>YMIN              4-1   54-1  12 3 60-1  -1  -1-1                   2-<BR>XMAX              4-1   94-1  12 3 60-1  -1  -1-1                   3-<BR>YMAX              4-1  134-1  12 3 60-1  -1  -1-1                   4-<BR> 3.4009988E+05 4.1000000E+06 3.4090012E+05 4.1003995E+06</P>
<P>An example of a double-precision .BND section follows:</P>
<P>STDFIG11CPX.BND                 XX   4   4  32         1<BR>XMIN              8-1   14-1  18 5 60-1  -1  -1-1                   1-<BR>YMIN              8-1   94-1  18 5 60-1  -1  -1-1                   2-<BR>XMAX              8-1  174-1  18 5 60-1  -1  -1-1                   3-<BR>YMAX              8-1  254-1  18 5 60-1  -1  -1-1                   4-<BR> 3.40100000000000000E+05 4.10000000000000000E+06 3.40900000000000000E+05<BR>4.10040<BR>000000000000E+06</P>

<P>4   INFO FILE FORMATS</P>
<P>INFO files follow the same format:</P>
<P>         name of the info file and summary information<BR>         definitions for each of the items<BR>         actual data values</P>
<P>The name line consists of six fields:</P>
<P>     1.   name of the INFO file<BR>     2.   appears to be flag for ARC/INFO table ('XX') or other<BR>          INFO table ('  ')<BR>     3.   number of items<BR>     4.   appears to repeat number of items <BR>     5.   length of data record<BR>     6.   number of data records</P>
<P>The definitions for each item consist of eight fields:</P>
<P>     1-   name of item<BR>     2-   width of item followed by a constant of '-1'<BR>     3-   start position of item followed by a constant of '4-1'<BR>     4-   output format of item (see below for discussion)<BR>     5-   type of item (see below for discussion)<BR>     6-   appears to be constant of '-1'<BR>     7-   appears to be constant of '-1-1'<BR>     8-   appears to be sequential identifier</P>
<P>The output format field is handled differently for numeric and<BR>character items.  Numeric items give the output width followed by<BR>a space then the number of decimal positions.  Character items<BR>give the output width followed by a constant of '-1'.</P>
<P>The type of the item is specified by the following codes:</P>
<P>         20-1 indicates character<BR>         50-1 indicates binary integer<BR>         60-1 indicates real number</P>
<P>The other item types have not yet been identified.</P>
<P>Formats will be given for the most common INFO files:</P>
<P>         .AAT<BR>         .ACODE<BR>         .BND<BR>         .PAT<BR>         .PCODE<BR>         .TIC<BR>4.1 .AAT</P>
<P>The .AAT (Arc Attribute Table) contains seven fields whose item<BR>names are self-explanatory.  However, additional items may be<BR>added as desired, after the -ID item.</P>
<P>An example of an actual .AAT section follows:</P>
<P>LANDLICL.AAT                    XX   7   7  28         7<BR>FNODE#            4-1   14-1   5-1 50-1  -1  -1-1                   1-<BR>TNODE#            4-1   54-1   5-1 50-1  -1  -1-1                   2-<BR>LPOLY#            4-1   94-1   5-1 50-1  -1  -1-1                   3-<BR>RPOLY#            4-1  134-1   5-1 50-1  -1  -1-1                   4-<BR>LENGTH            4-1  174-1  12 3 60-1  -1  -1-1                   5-<BR>LANDLICL#         4-1  214-1   5-1 50-1  -1  -1-1                   6-<BR>LANDLICL-ID       4-1  254-1   5-1 50-1  -1  -1-1                   7-<BR>          2          1          0          0 2.0006265E+02          1         <BR>2<BR>          3          2          0          0 2.0006250E+02          2         <BR>3<BR>          1          4          0          0 1.0989176E+03          3         <BR>1<BR>          4          3          0          0 2.0003140E+02          4         <BR>4<BR>          3          4          0          0 2.8198248E+02          5         <BR>6<BR>          4          5          0          0 8.2309576E+02          6         <BR>7<BR>          5          2          0          0 2.2345322E+02          7         <BR>5<BR></P>

<P>3.6 PRJ</P>
<P>The PRJ (Projection Parameters) file consists of a set of<BR>projection keywords and values including a set of parameters<BR>following the keyword "Parameters".</P>
<P>This file needs further research for specific keywords and<BR>parameters for the projections supported by ADS and MOSS.</P>
<P>An example of an actual PRJ section follows:</P>
<P>PRJ  2<BR>Projection    UTM<BR>~<BR>Zone          13<BR>~<BR>Datum         NAD27<BR>~<BR>Zunits        NO<BR>~<BR>Units         METERS<BR>~<BR>Spheroid      CLARKE1866<BR>~<BR>Xshift        0.0000000000<BR>~<BR>Yshift        0.0000000000<BR>~<BR>Parameters<BR>~<BR>EOP</P>
<P>3.7 SIN</P>
<P>Spatial Index</P>
<P>It usually is comprised of a single line with the value "EOX".</P>
<P>An example of an actual SIN section follows:</P>
<P>SIN  2<BR>EOX</P>
<P>3.8 TOL</P>
<P>This consists of ten lines with a tolerance type, a tolerance<BR>status, and a tolerance value on each line.  The tolerance types<BR>are:</P>
<P>     1.   fuzzy<BR>     2.   generalize (unused)<BR>     3.   node match (unused)<BR>     4.   dangle<BR>     5.   tic match<BR>     6.   undefined<BR>     7.   undefined<BR>     8.   undefined<BR>     9.   undefined<BR>     10.  undefined</P>
<P>The tolerance status "is set to 1 if the tolerance is verified<BR>(been applied to operations of the coverage) and to 2 if the<BR>tolerance is not verified (been set by the TOLERANCE command, but<BR>not yet used in processing)."  </P>
<P>An example of an actual TOL section follows:</P>
<P>TOL  2<BR>         1         1 8.1813842E-01<BR>         2         2 0.0000000E+00<BR>         3         2 0.0000000E+00<BR>         4         1 0.0000000E+00<BR>         5         2 0.0000000E+00<BR>         6         2 8.0025000E+00<BR>         7         2 8.0025000E-01<BR>         8         2 8.0025000E-01<BR>         9         2 8.0025000E-01<BR>        10         2 8.0025000E-01<BR>        -1         0         0         0         0         0         0</P>
<P>An example of a double-precision TOL section follows:</P>
<P>TOL  3<BR>         1         2 8.00000000000000E-02<BR>         2         2 0.00000000000000E+00<BR>         3         2 0.00000000000000E+00<BR>         4         2 0.00000000000000E+00<BR>         5         2 0.00000000000000E+00<BR>         6         2 8.00000000000000E+00<BR>         7         2 8.00000000000000E-01<BR>         8         2 8.00000000000000E-01<BR>         9         2 8.00000000000000E-01<BR>        10         2 8.00000000000000E-01<BR>        -1         0         0         0         0         0         0</P>

<P>3.4 LOG</P>
<P>The LOG (Coverage History) file contains a free form set of lines<BR>of indeterminate number which are separated by lines which begins<BR>with a tilde, "~".</P>
<P>ARC records many commands and their resource impacts in this<BR>file.  The standard ARC format for writing in the LOG has nine<BR>fields:</P>
<P>         Year (I4)<BR>         Month (I2)<BR>         Day (I2)<BR>         Hours (I2)<BR>         Minutes (I2)<BR>         Connect Time in minutes (I4)<BR>         CPU Time in seconds (I6)<BR>         I/O Time in seconds (I6)<BR>         Command line (A100)</P>
<P>However, any information can be added to the LOG file in free-<BR>form format.</P>
<P>An example of an actual LOG section follows:</P>
<P>LOG  2<BR>19940118 849   0     3    35export cover landli stdfigc none<BR>~<BR>19940118 850   0     7   190clean landli landlicp # # poly<BR>~<BR>EOL</P>
<P>3.5 PAL</P>
<P>The PAL (Polygon Topology) file consists of repeating sets of<BR>polygon information.  The first line of each set has five<BR>numbers:</P>
<P>     1.   number of arcs in polygon<BR>     2.   x min of polygon<BR>     3.   y min of polygon<BR>     4.   x max of polygon<BR>     5.   y max of polygon</P>
<P>The subsequent lines of a set give information on the arcs which<BR>comprise the polygon.  There are three numbers per arc with<BR>information for two arcs per line.</P>
<P>     1.   the arc number (negative if reversed)<BR>     2.   the node number<BR>     3.   the polygon number</P>
<P>The first polygon given is the universal polygon.</P>
<P>"The PAL file contains the polygon topology for a coverage and<BR>min-max boxes for the polygons.  For each polygon in a coverage<BR>the PAL file has a (usually) clockwise list of the arcs, nodes<BR>that comprise the polygons, as well as the adjacent polygons, and<BR>a min-max box.  To keep a continuous list, 'virtual' arcs with<BR>arc# of 0 are used to connect to holes (thus forming donuts),<BR>which are connected in counter-clockwise order.  The PAL file is<BR>a random access, variable record length file, with the length<BR>dependent on the number of arcs surrounding the polygon (1 to<BR>10000).</P>
<P>The arc# in the PAL file is the record number of that arc within<BR>the coverage's ARC file, the node# is the same as the node# in<BR>the arc file at the appropriate end, and the polygon# is the<BR>record number of that polygon within the coverage's PAL file. <BR>The PAL file record number for a polygon is the same as the PAT<BR>file record number and the CNT file record number."  SDL<BR>documentation, July 1989, p. 24.</P>
<P>An example of an actual PAL section follows:</P>
<P>PAL  2<BR>         5 3.4009988E+05 4.1000000E+06 3.4090012E+05 4.1003995E+06<BR>         0         0         0        -1         1         2<BR>        -7         2         3        -6         5         3<BR>        -3         4         2<BR>         4 3.4009988E+05 4.1001995E+06 3.4090012E+05 4.1003995E+06<BR>         1         2         1         3         1         1<BR>         4         4         4         2         3         3<BR>         4 3.4019978E+05 4.1000000E+06 3.4079997E+05 4.1001998E+06<BR>        -2         2         2         5         3         4<BR>         6         4         1         7         5         1<BR>         2 3.4050000E+05 4.1001002E+06 3.4070003E+05 4.1001998E+06<BR>        -4         3         2        -5         4         3<BR>        -1         0         0         0         0         0         0<BR></P>

<P>3.2 CNT</P>
<P>The CNT (Polygon Centroid Coordinates) file contains the centroid<BR>of each polygon in the coverage.  It has sets of centroid<BR>information with an initial coordinate line and, if there are<BR>labels, one line per label giving the number for the label.  The<BR>coordinate line has three fields:</P>
<P>     1-   number of labels in polygon<BR>     2-   centroid x<BR>     3-   centroid y</P>
<P>An example of an actual CNT section follows:</P>
<P>CNT  2<BR>         0 3.4048516E+05 4.1001702E+06<BR>         1 3.4046691E+05 4.1002662E+06<BR>         1<BR>         1 3.4048875E+05 4.1000852E+06<BR>         2<BR>         0 3.4060000E+05 4.1001665E+06<BR>        -1         0         0         0         0         0         0</P>
<P>3.3 LAB</P>
<P>The LAB (label point coordinates and topology) file consists of<BR>repeating sets of label point information.  The first line of<BR>each set has four numbers:</P>
<P>     1.   coverage-ID<BR>     2.   polygon which encloses it<BR>     3.   x coordinate<BR>     4.   y coordinate</P>
<P>The second and final line of the set gives the label box window. <BR>This information is marked as marked as obsolete in the SDL<BR>documentation.  It currently contains repetitions of the x and y<BR>coordinates.</P>
<P>Note that the LAB section ends with a different '-1' line than<BR>the other files.</P>
<P>An example of an actual LAB section follows:</P>
<P>LAB  2<BR>         1         2 3.4046650E+05 4.1002668E+06<BR> 3.4046650E+05 4.1002668E+06 3.4046650E+05 4.1002668E+06<BR>         2         3 3.4048869E+05 4.1000852E+06<BR> 3.4048869E+05 4.1000852E+06 3.4048869E+05 4.1000852E+06<BR>        -1         0 0.0000000E+00 0.0000000E+00</P>
<P>An example of a double-precision LAB section follows:</P>
<P>LAB  3<BR>         1         2 3.40500000000000E+05 4.10006225000000E+06<BR> 3.40500000000000E+05 4.10006225000000E+06<BR> 3.40500000000000E+05 4.10006225000000E+06<BR>         2         3 3.40468812500000E+05 4.10026225000000E+06<BR> 3.40468812500000E+05 4.10026225000000E+06<BR> 3.40468812500000E+05 4.10026225000000E+06<BR>        -1         0 0.00000000000000E+00 0.00000000000000E+00<BR></P>

<P>3.1 ARC</P>
<P>The ARC (arc coordinates and topology) file consists of repeating<BR>sets of arc information.  The first line of each set has seven<BR>numbers:</P>
<P>     1.   coverage#<BR>     2.   coverage-ID<BR>     3.   from node<BR>     4.   to node<BR>     5.   left polygon<BR>     6.   right polygon<BR>     7.   number of coordinates</P>
<P>The subsequent lines of a set are the coordinates with two x-y<BR>pairs per line, if the coverage is single-precision.  If there<BR>are an odd number of coordinates, the last line will have only<BR>one x-y pair.  Double-precision puts one coordinate pair on each<BR>line.</P>
<P>An example of an actual ARC section follows:</P>
<P>ARC  2<BR>         1         2         2         1         1         2         2<BR> 3.4029994E+05 4.1001998E+06 3.4009988E+05 4.1002000E+06<BR>         2         3         3         2         3         2         2<BR> 3.4050000E+05 4.1001998E+06 3.4029994E+05 4.1001998E+06<BR>         3         1         1         4         1         2         4<BR> 3.4009988E+05 4.1002000E+06 3.4040006E+05 4.1003995E+06<BR> 3.4090012E+05 4.1002000E+06 3.4070003E+05 4.1001995E+06<BR>         4         4         4         3         4         2         2<BR> 3.4070003E+05 4.1001995E+06 3.4050000E+05 4.1001998E+06<BR>         5         6         3         4         4         3         3<BR> 3.4050000E+05 4.1001998E+06 3.4059997E+05 4.1001002E+06<BR> 3.4070003E+05 4.1001995E+06<BR>         6         7         4         5         1         3         3<BR> 3.4070003E+05 4.1001995E+06 3.4079997E+05 4.1000002E+06<BR> 3.4019978E+05 4.1000000E+06<BR>         7         5         5         2         1         3         2<BR> 3.4019978E+05 4.1000000E+06 3.4029994E+05 4.1001998E+06<BR>        -1         0         0         0         0         0         0</P>
<P>An example of a double-precision ARC section follows:</P>
<P>ARC  3<BR>         1         0         0         0         0         0         7<BR> 3.40200000000000E+05 4.10000000000000E+06<BR> 3.40300000000000E+05 4.10020000000000E+06<BR> 3.40500000000000E+05 4.10020000000000E+06<BR> 3.40600000000000E+05 4.10010000000000E+06<BR> 3.40700000000000E+05 4.10020000000000E+06<BR> 3.40800000000000E+05 4.10000000000000E+06<BR> 3.40200000000000E+05 4.10000000000000E+06<BR>         2         0         0         0         0         0         4<BR> 3.40100000000000E+05 4.10020000000000E+06<BR> 3.40400000000000E+05 4.10040000000000E+06<BR> 3.40900000000000E+05 4.10020000000000E+06<BR> 3.40100000000000E+05 4.10020000000000E+06<BR>        -1         0         0         0         0         0         0<BR></P>

<P>这个是以前看过的一个格式说明,发上做参考</P>
<P>下载地址:</P>
<P><a href="attachment/2005-11/200511716371527846.txt">2005-11/200511716371527846.txt</a></P>
<P>                    ANALYSIS</P>
<P>                               OF</P>
<P>                     ARC EXPORT FILE FORMAT<br>                                <br>                               FOR</P>
<P>                      ARC/INFO (REV 6.1.1)</P><br><br><br><br><br>
<P><br>                       TABLE OF CONTENTS</P>
<P>1    INTRODUCTION. . . . . . . . . . . . . . . . . . . . . . .  1</P>
<P>2    OVERALL ORGANIZATION. . . . . . . . . . . . . . . . . . .  2</P>
<P>3    ARC FILE FORMATS. . . . . . . . . . . . . . . . . . . . .  3<br>     3.1  ARC. . . . . . . . . . . . . . . . . . . . . . . . .  4<br>     3.2  CNT. . . . . . . . . . . . . . . . . . . . . . . . .  6<br>     3.3  LAB. . . . . . . . . . . . . . . . . . . . . . . . .  7<br>     3.4  LOG. . . . . . . . . . . . . . . . . . . . . . . . .  8<br>     3.5  PAL. . . . . . . . . . . . . . . . . . . . . . . . .  9<br>     3.6  PRJ. . . . . . . . . . . . . . . . . . . . . . . . . 11<br>     3.7  SIN. . . . . . . . . . . . . . . . . . . . . . . . . 12<br>     3.8  TOL. . . . . . . . . . . . . . . . . . . . . . . . . 13</P>
<P>4    INFO FILE FORMATS . . . . . . . . . . . . . . . . . . . . 14<br>     4.1  .AAT . . . . . . . . . . . . . . . . . . . . . . . . 15<br>     4.2  .ACODE . . . . . . . . . . . . . . . . . . . . . . . 16<br>     4.3  .BND . . . . . . . . . . . . . . . . . . . . . . . . 17<br>     4.4  .PAT . . . . . . . . . . . . . . . . . . . . . . . . 18<br>     4.5  .PCODE . . . . . . . . . . . . . . . . . . . . . . . 19<br>     4.6  .TIC . . . . . . . . . . . . . . . . . . . . . . . . 20</P>
<P>5    CONCLUSION. . . . . . . . . . . . . . . . . . . . . . . . 21</P>
<P>APPENDIX A:  SAMPLE EXPORT FILE BEFORE TOPOLOGY. . . . . . . . 22</P>
<P>APPENDIX B:  SAMPLE EXPORT FILE AFTER POLYGON TOPOLOGY . . . . 24</P>
<P>APPENDIX C:  SAMPLE EXPORT FILE AFTER LINE TOPOLOGY. . . . . . 27</P>
<P>APPENDIX D:  SAMPLE EXPORT FILE FOR POINT COVERAGE . . . . . . 30</P>
<P>APPENDIX E:  SAMPLE EXPORT FILE FOR SINGLE-PRECISION<br>     COVERAGE. . . . . . . . . . . . . . . . . . . . . . . . . 35</P>
<P>APPENDIX F:  SAMPLE EXPORT FILE FOR DOUBLE-PRECISION<br>     COVERAGE. . . . . . . . . . . . . . . . . . . . . . . . . 37<br>1   INTRODUCTION</P>
<P><br>Note:  ESRI considers the export/import file format to be<br>proprietary.  As a consequence, the identified format can only<br>constitute a "best guess" and must always be considered as<br>tentative and subject to revision, as more is learned.</P>
<P>It appears that all ARC/INFO files except user-created lookup<br>tables are exported, including .ACODE and .PCODE.<br>2   OVERALL ORGANIZATION</P>
<P>The export file begins with a line with three fields.</P>
<P>     1-   an initial 'EXP'<br>     2-   what appears to be a constant of '0'<br>     3-   the pathname for the creation of the export file</P>
<P>The export file ends with a line beginning 'EOS'.</P>
<P>The ARC files are included first, in alphabetical order except<br>for the SIN, LOG, and PRJ files which occur last.  Then the INFO<br>files are included in alphabetical order.</P>
<P>The beginning of each ARC file is indicated by the file name (a<br>three-character identifier) followed by '  2' for single-<br>precision or '  3' for double-precision.  Single-precision<br>carries 8 digits, and double-precision carries 15 digits.</P>
<P>Each ARC file ends with a line of seven numbers beginning with a<br>-1 and followed by six zeros, except the SIN, LOG, and PRJ files<br>which end in 'EOX', 'EOL', and 'EOP', respectively.  The LAB file<br>uses a slight variation of this -1 ending line (see below).  The<br>format for each ARC file is specific to that type of file.  These<br>formats are covered below.</P>
<P>The beginning of the INFO file section is indicated by 'IFO  2',<br>and its end is indicated by 'EOI'. The INFO files each begin with<br>the file name.  For example, the polygon attribute table would be<br>'STDFIG24C.PAT' on a line by itself.  The format is the same for<br>every INFO file.  This format is given below.<br>3   ARC FILE FORMATS</P>
<P>Formats will be given for the most common ARC files:</P>
<P>         ARC<br>         CNT<br>         LAB<br>         LOG<br>         PAL<br>         PAR<br>         PRJ<br>         SIN<br>         TOL</P><br>

<P>我看了一下那个网站，那里只说了怎么读写的方法，但是涉及到内核数据如何读取的问题,却略了。</P>
<P>嗯，如果问题解决了，一定过来说明的。</P>

希望有结果到这里发布下成果和经验，这个问题还是大家比较需要的:)

<P>真是不错的地方，先谢谢您，我去看看</P>
<P><img src="images/post/smile/dvbbs/em02.gif" />  </P>