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annotate pkg/imports/isr.go @ 4215:e453d3bf7663

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Refresh iso contours import: Fixed usage of SQL to list all bottlenecks.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Fri, 16 Aug 2019 14:38:19 +0200
parents 49564382ffff
children cbc75527916f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
4214
49564382ffff Added a import queue job to recalculate the contour lines of the sounding results if the heights have changed.
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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) 2018 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 imports
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15
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16 import (
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17 "context"
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18 "database/sql"
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19 "time"
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20
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21 "gemma.intevation.de/gemma/pkg/octree"
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22 )
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23
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24 type IsoRefresh struct {
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25 ClassBreaks string `json:"class-breaks"`
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26 }
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27
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28 // ISRJobKind is the unique name of this import job type.
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29 const ISRJobKind JobKind = "isr"
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30
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31 func init() { RegisterJobCreator(ISRJobKind, isrJobCreator{}) }
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32
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33 type isrJobCreator struct{}
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34
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35 func (isrJobCreator) Description() string { return "refresh iso lines" }
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36
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37 func (isrJobCreator) AutoAccept() bool { return true }
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38
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39 func (isrJobCreator) Create() Job { return new(IsoRefresh) }
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40
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41 func (isrJobCreator) StageDone(context.Context, *sql.Tx, int64) error {
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42 return nil
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43 }
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44
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45 func (isrJobCreator) Depends() [2][]string {
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46 return [2][]string{
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47 {"sounding_results", "sounding_results_contour_lines"},
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48 {},
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49 }
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50 }
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51
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52 const (
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53 fetchSoundingResultsIDsSQL = `
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54 SELECT bottleneck_id, id
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55 FROM waterway.sounding_results
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56 ORDER BY bottleneck_id
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57 `
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58 deleteContourLinesSQL = `
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59 DELETE FROM waterway.sounding_results_contour_lines
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60 WHERE sounding_result_id = $1
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61 `
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62 )
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63
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64 func (isr *IsoRefresh) CleanUp() error { return nil }
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65
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66 type bottleneckSoundingResults struct {
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67 bn string
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68 srs []int64
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69 }
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70
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71 func fetchBottleneckResults(
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72 ctx context.Context,
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73 conn *sql.Conn,
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74 ) ([]bottleneckSoundingResults, error) {
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75
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76 rows, err := conn.QueryContext(ctx, fetchSoundingResultsIDsSQL)
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77 if err != nil {
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78 return nil, err
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79 }
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80 defer rows.Close()
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81
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82 var ids []bottleneckSoundingResults
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83
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84 for rows.Next() {
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85 var bn string
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86 var sr int64
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87 if err := rows.Scan(&bn, &sr); err != nil {
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88 return nil, err
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89 }
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90 if len(ids) > 0 {
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91 if ids[len(ids)-1].bn != bn {
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92 ids = append(ids, bottleneckSoundingResults{
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93 bn: bn,
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94 srs: []int64{sr},
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95 })
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96 } else {
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97 ids[len(ids)-1].srs = append(ids[len(ids)-1].srs, sr)
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98 }
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99 } else {
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100 ids = []bottleneckSoundingResults{
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101 {bn: bn, srs: []int64{sr}},
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102 }
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103 }
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104 }
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105 if err := rows.Err(); err != nil {
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106 return nil, err
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107 }
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108 return ids, nil
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109 }
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110
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111 // Do executes the actual refreshing of the iso lines.
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112 func (isr *IsoRefresh) Do(
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113 ctx context.Context,
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114 importID int64,
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115 conn *sql.Conn,
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116 feedback Feedback,
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117 ) (interface{}, error) {
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118
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119 start := time.Now()
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120 defer func() {
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121 feedback.Info(
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122 "Processing all sounding results took %v.",
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123 time.Since(start))
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124 }()
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125
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126 heights, err := octree.ParseClassBreaks(isr.ClassBreaks)
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127 if err != nil {
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128 return nil, err
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129 }
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130
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131 bns, err := fetchBottleneckResults(ctx, conn)
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132 if err != nil {
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133 return nil, err
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134 }
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135
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136 for i := range bns {
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137 start := time.Now()
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138 err := isr.processBottleneck(
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139 ctx, conn,
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140 heights,
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141 &bns[i],
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142 )
4215
e453d3bf7663 Refresh iso contours import: Fixed usage of SQL to list all bottlenecks.
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parents: 4214
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143 feedback.Info("Processing bottleneck '%s' took %v",
4214
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144 bns[i].bn,
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145 time.Since(start))
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146 if err != nil {
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147 return nil, err
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148 }
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149 }
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150
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151 return nil, nil
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152 }
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153
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154 func (isr *IsoRefresh) processBottleneck(
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155 ctx context.Context,
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156 conn *sql.Conn,
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157 heights []float64,
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158 bn *bottleneckSoundingResults,
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159 ) error {
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160 // Do one transaction per bottleneck.
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161 tx, err := conn.BeginTx(ctx, nil)
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parents:
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162 if err != nil {
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163 return nil
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164 }
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165 defer tx.Rollback()
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166
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167 insertStmt, err := tx.Prepare(insertContourSQL)
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168 if err != nil {
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parents:
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169 return err
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parents:
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170 }
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parents:
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171
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parents:
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172 // For all sounding results in bottleneck.
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173 for _, sr := range bn.srs {
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parents:
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174 tree, err := octree.FetchOctreeDirectly(ctx, tx, sr)
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175 if err != nil {
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parents:
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176 return err
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177 }
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178 hs := octree.ExtrapolateClassBreaks(heights, tree.Min.Z, tree.Max.Z)
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179
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180 // Delete the old contour lines.
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181 if _, err := tx.ExecContext(ctx, deleteContourLinesSQL, sr); err != nil {
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parents:
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182 return err
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parents:
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183 }
49564382ffff Added a import queue job to recalculate the contour lines of the sounding results if the heights have changed.
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parents:
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184
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parents:
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185 octree.DoContours(tree, hs, func(res *octree.ContourResult) {
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parents:
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186 if err == nil && len(res.Lines) > 0 {
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parents:
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187 _, err = insertStmt.ExecContext(
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parents:
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188 ctx,
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parents:
diff changeset
189 sr, res.Height, tree.EPSG,
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parents:
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190 res.Lines.AsWKB2D(),
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parents:
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191 contourTolerance)
49564382ffff Added a import queue job to recalculate the contour lines of the sounding results if the heights have changed.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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192 }
49564382ffff Added a import queue job to recalculate the contour lines of the sounding results if the heights have changed.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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193 })
49564382ffff Added a import queue job to recalculate the contour lines of the sounding results if the heights have changed.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
194 if err != nil {
49564382ffff Added a import queue job to recalculate the contour lines of the sounding results if the heights have changed.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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195 return err
49564382ffff Added a import queue job to recalculate the contour lines of the sounding results if the heights have changed.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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196 }
49564382ffff Added a import queue job to recalculate the contour lines of the sounding results if the heights have changed.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
197 }
49564382ffff Added a import queue job to recalculate the contour lines of the sounding results if the heights have changed.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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198
49564382ffff Added a import queue job to recalculate the contour lines of the sounding results if the heights have changed.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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199 return nil
49564382ffff Added a import queue job to recalculate the contour lines of the sounding results if the heights have changed.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
200 }