1SHPDUMP(1)                         shapelib                         SHPDUMP(1)
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NAME

6       shpdump  - dumps as text and/or validates the content of an ESRI shape‐
7       file
8

SYNOPSIS

10       shpdump [-validate] shp_file
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DESCRIPTION

13       Prints the contents of the shapefile shp_file  to  standard  output  in
14       textual  format. Shapefiles actually consist of two files with the same
15       basename and extensions .shp and .shx (or .SHP and .SHX) containing the
16       shape  data  and shape index respectively. The files to open are deter‐
17       mined by first stripping  any  filename  extension  from  shp_file  and
18       attempting   to  open  the  files  shp_file.shp  or  shp_file.SHP,  and
19       shp_file.shx or shp_file.SHX for the respective data and index files.
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21       Output consists of a header giving number and type  of  shapes  in  the
22       file  and  the bounds for the minimum and maximum X, Y, Z, and M values
23       appearing in the shapes. The header is followed by the  geometric  data
24       for  each  shape  in  the file. All shapes in the file should be of the
25       same type, except that NullShape typed shapes may  be  intermixed  with
26       any other type. The header has the form
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30           Shapefile Type: type # of Shapes: count
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32           File Bounds: (minX,minY,minZ,minM)
33                    to  (maxX,maxY,maxZ,maxM)
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37       See section SHAPE TYPES below for the list of possible shape types.
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39       Next  for each shape in the file a header giving it´s shape_index, it´s
40       type type, number of vertices nVertices, number of  parts  nParts,  and
41       bounding box is given, followed by the vertex data of each part.
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45           Shape:  shape_index (type) nVertices=nVertices, nParts=nParts
46             Bounds: (minX,minY,minZ,minM)
47                 to  (maxX,maxY,maxZ,maxM)
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49             vertices of the first part
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51           + vertices of the second part...
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53           + vertices of the last part
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57       The  shape_index  of  a  shape is the number of the shape starting from
58       zero in the shape file. Each vertex has the form
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62           (X,Y,Z,M)
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66       If there are multiple parts then the  type  of  the  part  is  appended
67       appended to first vertex of each part, and the first vertex of the sec‐
68       ond and following parts is preceded by a plus (+) sign. The  part  type
69       is Ring for all shape types except MultiPatch where it is the type of a
70       surface patch. See below for the description of possible part types.
71

SHAPE TYPES

73       Each type of shape  except  MultiPatch  typed  shapes  comes  in  three
74       flavours:  The normal unsuffixed type, where points lie in X/Y-space; a
75       type with suffix M where points lie in X/Y-space and additionally  have
76       a  measure  value  in  M-space;  and finally a type with suffix Z where
77       points lie in X/Y/Z-space and also have a measure value in M-space.
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79       NullShape
80              A shape without data. Shapes of this type may be intermixed with
81              other  shapes  and  are sometimes used to represented deleted or
82              missing geometric data for a shape.
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84       Point or PointZ or PointM
85              A single point.
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87       Arc or ArcZ or ArcM
88              Piecewise linear paths. Shapes of this type may consist of  mul‐
89              tiple  parts which may or may not intersect and/or connect. Arcs
90              are called PolyLines in the shapefile specification.
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92       Polygon or PolygonZ or PolygonM
93              Polygon shapes consist of one or more parts, called rings,  that
94              each define a closed path. Rings must contain at least four ver‐
95              tices with the first and last vertices being equal, and must not
96              self-intersect.  For  shapes of type Polygon, the rings define a
97              polygon with optional holes by  giving  the  vertices  of  inner
98              rings  a  counterclockwise orientation and the vertices of outer
99              rings a clockwise orientation. Intersection and  orientation  is
100              always computed in X/Y-space and never in X/Y/M-space.
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102       MultiPoint or MultiPointZ or MultiPointM
103              A set of points.
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105       MultiPatch
106              A MultiPatch represents one or more surfaces in X/Y/Z-space, and
107              consists of a number of parts called it´s surface patches.  Each
108              surface  patch describes a either a surface or a hole in another
109              surface, depending on the type of the patch. Patches may share a
110              common  boundary  but may not otherwise intersect. The type of a
111              patch may be one of
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113              TriangleStrip: A set of connected  triangles.  The  first  three
114              points  define  the  first  triangle  and  every following point
115              defines a new triangle using the new point and the two  previous
116              points.
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118              TriangleFan:  A  set  of  connected  triangles.  The first three
119              points define the  first  triangle  and  every  following  point
120              defines  a  new  triangle  using the previous point, the current
121              point, and the first point, thus  forming  a  fan  of  triangles
122              around the first point.
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124              OuterRing:  The  outer  ring  of  a sequence of rings defining a
125              polygon with holes. All following parts of  type  InnerRing  are
126              taken to be the holes of the polygon. The sequence of rings ends
127              with the first non-InnerRing typed  part  or  the  part  of  the
128              shape, whichever comes first.
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130              InnerRing: An inner ring in a sequence of rings defining a poly‐
131              gon with holes. This type of part may only follow  an  OuterRing
132              or other InnerRing typed parts.
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134              FirstRing:  The  first in a sequence of rings defining a polygon
135              of unspecified type. The following parts of  type  Ring  defines
136              the  other  rings in the polygon. This type of part is used when
137              the innerness or outerness of a polygon isn´t known or  applica‐
138              ble.  The  sequence  of rings defining the polygon ends with the
139              first non-Ring typed part or the last part of the shape,  which‐
140              ever comes first.
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142              Ring:  A  ring  in  a  sequence  of  rings defining a polygon of
143              unspecified type. It may only follow a FirstRing or  other  Ring
144              typed parts.
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146              UknownPartType: This type is returned for parts whose type isn´t
147              recognised.
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149       UnknownShapeType
150              This type is returned for shapes whose type isn´t recognised.
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152

OPTIONS

154       -validate
155              count the number of objects that have invalid ring ordenings
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157              Performs validation on the orientation of inner and outer  rings
158              in  Polygon,  PolygonZ,  and  PolygonM objects. According to the
159              shapefile specification outer rings should be given a  clockwise
160              orientation,  and  inner rings that define holes a counterclock‐
161              wise orientation. If some rings of  a  shape  are  oriented  the
162              wrong  way  around  then  the  following message is output after
163              dumping that shape:
164
165              count rings wound in the wrong direction.
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167              In addition the total number of shapes  with  problem  rings  is
168              output after the last shape has been dumped:
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170              count object has invalid ring orderings.
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172       shp_file
173              the name of an existing shapefile.
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EXIT STATUS

177       0      Successful program execution.
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179       1      No shapefile shp_file was given or it couldn´t be opened.
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EXAMPLE

182       $ shpdump shapefile.shp
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184       Shapefile Type: Arc   # of Shapes: 3
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186       File Bounds: ( 3531586.750, 7253086.100,0,0)
187                to  ( 3536417.463, 7778375.875,0,0)
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189       Shape:0 (Arc)  nVertices=2, nParts=1
190         Bounds:( 3536397.797, 7253086.100, 0, 0)
191             to ( 3536417.463, 7253163.597, 0, 0)
192            ( 3536397.797, 7253163.597, 0, 0) Ring
193            ( 3536417.463, 7253086.100, 0, 0)
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195       Shape:1 (Arc)  nVertices=3, nParts=1
196         Bounds:( 3458966.390, 7373335.808, 0, 0)
197             to ( 3459141.856, 7373474.681, 0, 0)
198            ( 3458966.390, 7373474.681, 0, 0) Ring
199            ( 3458979.042, 7373466.273, 0, 0)
200            ( 3459141.856, 7373335.808, 0, 0)
201
202       Shape:2 (Arc)  nVertices=7, nParts=1
203         Bounds:( 3531586.750, 7777880.500, 0, 0)
204             to ( 3532930.206, 7778375.875, 0, 0)
205            ( 3531586.750, 7777880.500, 0, 0) Ring
206            ( 3532228.265, 7778072.455, 0, 0)
207            ( 3532310.897, 7778119.445, 0, 0)
208            ( 3532367.866, 7778144.877, 0, 0)
209            ( 3532440.559, 7778168.920, 0, 0)
210            ( 3532506.504, 7778190.785, 0, 0)
211            ( 3532930.206, 7778375.875, 0, 0)
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213       $
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DIAGNOSTICS

216       The following diagnostics may be issued on stdout:
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218       Unable to open:shp_file
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AUTHOR

221       shpdump  is part of shapelib, maintained by Frank Warmerdam. This guide
222       was created by Eduardo Patoo Kanegae and converted to manpage by  Johan
223       Van  de  Wauw.  It  was  further  enhanced with the man page written by
224       Joonas Pihlaja (jpihlaja@cc.helsinki.fi).
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BUGS

227       The -validate option supports only one outer ring in a polygonal  shape
228       and  assumes  that  the  first  ring  in  a shape is the outer ring. It
229       doesn´t support polygons inside MultiPatch shapes. The X and Y  coordi‐
230       nates of a point are printed to three decimal places only.
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SEE ALSO

233       dbfadd(1),  dbfcat(1), dbfcreate(1), dbfdump(1), dbfinfo(1), shpadd(1),
234       shpcat(1),   shpcentrd(1),    shpcreate(1),    shpdxf(1),    shpfix(1),
235       shpinfo(1), shpproj(1), shprewind(1), shptest(1)
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239                                  August 2018                       SHPDUMP(1)
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