Mercurial > gemma

annotate pkg/wkb/data.go @ 5591:0011f50cf216 surveysperbottleneckid

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Removed no longer used alternative api for surveys/ endpoint. As bottlenecks in the summary for SR imports are now identified by their id and no longer by the (not guarantied to be unique!) name, there is no longer the need to request survey data by the name+date tuple (which isn't reliable anyway). So the workaround was now reversed.
author Sascha Wilde <wilde@sha-bang.de>
date Wed, 06 Apr 2022 13:30:29 +0200
parents 0ddb308fed37
children 1222b777f51f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 // This is Free Software under GNU Affero General Public License v >= 3.0
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2 // without warranty, see README.md and license for details.
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3 //
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4 // SPDX-License-Identifier: AGPL-3.0-or-later
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5 // License-Filename: LICENSES/AGPL-3.0.txt
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6 //
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7 // Copyright (C) 2019 by via donau
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH
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9 // Software engineering by Intevation GmbH
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10 //
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11 // Author(s):
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12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
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13
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14 package wkb
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15
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16 import (
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17 "bytes"
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18 "encoding/binary"
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19 "fmt"
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20 "math"
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21 )
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22
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23 type (
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24 PointGeom struct {
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25 X float64
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26 Y float64
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27 }
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28 LinearRingGeom []PointGeom
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29 PolygonGeom []LinearRingGeom
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30 MultiPolygonGeom []PolygonGeom
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31 )
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32
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33 func (mpg MultiPolygonGeom) AsWKB() []byte {
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34
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35 size := 1 + 4 + 4
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36 for _, pg := range mpg {
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37 size += 1 + 4 + 4
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38 for _, r := range pg {
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39 size += 4 + 2*8*len(r)
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40 }
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41 }
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42
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43 buf := bytes.NewBuffer(make([]byte, 0, size))
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44
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45 binary.Write(buf, binary.LittleEndian, NDR)
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46 binary.Write(buf, binary.LittleEndian, MultiPolygon)
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47 binary.Write(buf, binary.LittleEndian, uint32(len(mpg)))
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48
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49 for _, pg := range mpg {
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50 binary.Write(buf, binary.LittleEndian, NDR)
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51 binary.Write(buf, binary.LittleEndian, Polygon)
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52 binary.Write(buf, binary.LittleEndian, uint32(len(pg)))
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53
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54 for _, r := range pg {
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55 binary.Write(buf, binary.LittleEndian, uint32(len(r)))
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56 for _, p := range r {
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57 x := math.Float64bits(p.X)
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58 y := math.Float64bits(p.Y)
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59 binary.Write(buf, binary.LittleEndian, x)
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60 binary.Write(buf, binary.LittleEndian, y)
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61 }
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62 }
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63 }
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64
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65 return buf.Bytes()
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66 }
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67
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68 func (mpg *MultiPolygonGeom) FromWKB(data []byte) error {
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69 r := bytes.NewReader(data)
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70
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71 var order binary.ByteOrder
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72
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73 switch endian, err := r.ReadByte(); {
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74 case err != nil:
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75 return err
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76 case endian == NDR:
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77 order = binary.LittleEndian
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78 case endian == XDR:
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79 order = binary.BigEndian
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80 default:
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81 return fmt.Errorf("unknown byte order %x", endian)
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82 }
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83
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84 var geomType uint32
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85
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86 switch err := binary.Read(r, order, &geomType); {
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87 case err != nil:
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88 return err
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89 case geomType != MultiPolygon:
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90 return fmt.Errorf("unknown geometry type %x", geomType)
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91 }
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92
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93 var numPolygons uint32
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94 if err := binary.Read(r, order, &numPolygons); err != nil {
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95 return err
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96 }
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97
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98 polygons := make([]PolygonGeom, numPolygons)
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99
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100 for i := range polygons {
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101 switch endian, err := r.ReadByte(); {
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102 case err != nil:
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103 return err
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104 case endian == NDR:
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105 order = binary.LittleEndian
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106 case endian == XDR:
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107 order = binary.BigEndian
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108 default:
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109 return fmt.Errorf("unknown byte order %x", endian)
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110 }
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111
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112 switch err := binary.Read(r, order, &geomType); {
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113 case err != nil:
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114 return err
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115 case geomType != Polygon:
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116 return fmt.Errorf("unknown geometry type %x", geomType)
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117 }
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118
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119 var numRings uint32
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120 if err := binary.Read(r, order, &numRings); err != nil {
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parents: 4296
diff changeset
121 return err
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
122 }
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
123
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
124 rings := make([]LinearRingGeom, numRings)
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
125
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
126 for j := range rings {
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
127 var numPoints uint32
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
128 if err := binary.Read(r, order, &numPoints); err != nil {
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
129 return err
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
130 }
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
131 points := make([]PointGeom, numPoints)
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
132
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
133 for k := range points {
4301
b333d48ae555 Tightend the parsing of x/y data of WKB multi polyons a bit.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4300
diff changeset
134 var x, y uint64
4300
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
135 if err := binary.Read(r, order, &x); err != nil {
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
136 return err
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
137 }
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
138 if err := binary.Read(r, order, &y); err != nil {
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
139 return err
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
140 }
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
141 points[k] = PointGeom{
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
142 X: math.Float64frombits(x),
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
143 Y: math.Float64frombits(y),
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
144 }
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
145 }
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
146 rings[j] = points
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
147 }
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
148 polygons[i] = rings
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
149 }
8b730ee6f17b Completed parsing multi polygons from WKB.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4296
diff changeset
150
4296
95786a675d70 WIP: Started with downloading stretches as ESRI shapes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
151 *mpg = polygons
95786a675d70 WIP: Started with downloading stretches as ESRI shapes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
152 return nil
95786a675d70 WIP: Started with downloading stretches as ESRI shapes.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
153 }
4313
5da02dcc51f6 shape upload stretch import: Started to decode geometries and attributes from uploaded shape file.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4310
diff changeset
154
5da02dcc51f6 shape upload stretch import: Started to decode geometries and attributes from uploaded shape file.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4310
diff changeset
155 func (lr LinearRingGeom) CCW() bool {
5da02dcc51f6 shape upload stretch import: Started to decode geometries and attributes from uploaded shape file.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4310
diff changeset
156 var sum float64
5da02dcc51f6 shape upload stretch import: Started to decode geometries and attributes from uploaded shape file.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4310
diff changeset
157 for i, v1 := range lr {
5da02dcc51f6 shape upload stretch import: Started to decode geometries and attributes from uploaded shape file.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4310
diff changeset
158 v2 := lr[(i+1)%len(lr)]
5da02dcc51f6 shape upload stretch import: Started to decode geometries and attributes from uploaded shape file.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4310
diff changeset
159 sum += (v2.X - v1.X) * (v2.Y + v1.Y)
5da02dcc51f6 shape upload stretch import: Started to decode geometries and attributes from uploaded shape file.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4310
diff changeset
160 }
5da02dcc51f6 shape upload stretch import: Started to decode geometries and attributes from uploaded shape file.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4310
diff changeset
161 return sum > 0
5da02dcc51f6 shape upload stretch import: Started to decode geometries and attributes from uploaded shape file.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4310
diff changeset
162 }
4667
0ddb308fed37 Reintroduced the ST_MakeValid calls when inserting the iso geometries into the database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4331
diff changeset
163
0ddb308fed37 Reintroduced the ST_MakeValid calls when inserting the iso geometries into the database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4331
diff changeset
164 func (lr LinearRingGeom) Reverse() {
0ddb308fed37 Reintroduced the ST_MakeValid calls when inserting the iso geometries into the database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4331
diff changeset
165 for i, j := 0, len(lr)-1; i < j; i, j = i+1, j-1 {
0ddb308fed37 Reintroduced the ST_MakeValid calls when inserting the iso geometries into the database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4331
diff changeset
166 lr[i], lr[j] = lr[j], lr[i]
0ddb308fed37 Reintroduced the ST_MakeValid calls when inserting the iso geometries into the database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4331
diff changeset
167 }
0ddb308fed37 Reintroduced the ST_MakeValid calls when inserting the iso geometries into the database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 4331
diff changeset
168 }