Mercurial > gemma
annotate pkg/imports/sr.go @ 972:17a03a84b0e8
Split out polygon code out of sounding result importer source file.
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Thu, 18 Oct 2018 12:22:08 +0200 |
parents | f9fb6c399f3f |
children | b6fec8f85599 |
rev | line source |
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959
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1 package imports |
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2 |
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3 import ( |
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4 "archive/zip" |
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5 "bufio" |
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6 "context" |
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7 "database/sql" |
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8 "encoding/json" |
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9 "errors" |
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10 "fmt" |
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11 "io" |
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12 "log" |
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13 "os" |
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14 "path" |
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15 "strconv" |
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16 "strings" |
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17 "time" |
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18 |
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19 shp "github.com/jonas-p/go-shp" |
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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 SoundingResult struct { |
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25 who string |
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26 zip string |
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27 } |
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28 |
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29 const SoundingResultDateFormat = "2006-01-02" |
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30 |
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31 type ( |
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32 SoundingResultDate struct{ time.Time } |
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33 |
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34 SoundingResultMeta struct { |
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35 Date SoundingResultDate `json:"date"` |
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36 Bottleneck string `json:"bottleneck"` |
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37 EPSG uint `json:"epsg"` |
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38 DepthReference string `json:"depth-reference"` |
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39 } |
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40 ) |
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41 |
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42 const ( |
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43 insertPointsSQL = ` |
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44 INSERT INTO waterway.sounding_results ( |
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45 bottleneck_id, |
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46 date_info, |
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47 depth_reference, |
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48 point_cloud, |
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49 area |
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50 ) VALUES ( |
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51 (SELECT bottleneck_id from waterway.bottlenecks where objnam = $1), |
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52 $2::date, |
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53 $3, |
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54 ST_Transform(ST_GeomFromWKB($4, $6::integer), 4326)::geography, |
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55 (SELECT CASE $5 IS NULL THEN |
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56 ST_Transform( |
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57 ST_ConcaveHull( |
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58 ST_Force2D(ST_GeomFromWKB($4, $6::integer)), 0.7), 4326)::geography |
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59 ELSE |
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60 ST_Transform(ST_GeomFromWKB($5, $6::integer), 4326)::geography |
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61 END) |
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62 ) |
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63 RETURNING |
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64 id, |
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65 CASE WHEN ST_Y(ST_Centroid(point_cloud::geometry)) > 0 THEN |
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66 32600 |
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67 ELSE |
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68 32700 |
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69 END + floor((ST_X(ST_Centroid(point_cloud::geometry))+180)/6)::int + 1` |
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70 ) |
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71 |
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72 func (srd *SoundingResultDate) UnmarshalJSON(data []byte) error { |
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73 var s string |
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74 if err := json.Unmarshal(data, &s); err != nil { |
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75 return err |
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76 } |
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77 d, err := time.Parse(SoundingResultDateFormat, s) |
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78 if err == nil { |
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79 *srd = SoundingResultDate{d} |
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80 } |
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81 return err |
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82 } |
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83 |
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84 func (sr *SoundingResult) Who() string { |
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85 return sr.who |
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86 } |
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87 |
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88 func (sr *SoundingResult) CleanUp() error { |
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89 return os.RemoveAll(sr.zip) |
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90 } |
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91 |
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92 func find(needle string, haystack []*zip.File) *zip.File { |
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93 needle = strings.ToLower(needle) |
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94 for _, straw := range haystack { |
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95 if strings.HasSuffix(strings.ToLower(straw.Name), needle) { |
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96 return straw |
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97 } |
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98 } |
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99 return nil |
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100 } |
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101 |
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102 func loadMeta(f *zip.File) (*SoundingResultMeta, error) { |
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103 r, err := f.Open() |
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104 if err != nil { |
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105 return nil, err |
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106 } |
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107 defer r.Close() |
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108 var m SoundingResultMeta |
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109 err = json.NewDecoder(r).Decode(&m) |
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110 return &m, err |
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111 } |
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112 |
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113 func (m *SoundingResultMeta) validate(conn *sql.Conn) error { |
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114 |
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115 var b bool |
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116 err := conn.QueryRowContext(context.Background(), |
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117 `SELECT true FROM internal.depth_references WHERE depth_reference = $1`, |
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118 m.DepthReference).Scan(&b) |
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119 switch { |
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120 case err == sql.ErrNoRows: |
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121 return fmt.Errorf("Unknown depth reference '%s'\n", m.DepthReference) |
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122 case err != nil: |
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123 return err |
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124 case !b: |
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125 return errors.New("Unexpected depth reference") |
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126 } |
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127 |
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128 err = conn.QueryRowContext(context.Background(), |
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129 `SELECT true FROM waterway.bottlenecks WHERE objnam = $1`, |
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130 m.Bottleneck).Scan(&b) |
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131 switch { |
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132 case err == sql.ErrNoRows: |
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133 return fmt.Errorf("Unknown bottleneck '%s'\n", m.Bottleneck) |
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134 case err != nil: |
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135 return err |
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136 case !b: |
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137 return errors.New("Unexpected bottleneck") |
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138 } |
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139 |
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140 return nil |
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141 } |
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142 |
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143 func loadXYZReader(r io.Reader) (octree.MultiPointZ, error) { |
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144 mpz := make(octree.MultiPointZ, 0, 250000) |
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145 s := bufio.NewScanner(r) |
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146 |
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147 for line := 1; s.Scan(); line++ { |
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148 text := s.Text() |
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149 var p octree.Vertex |
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150 // fmt.Sscanf(text, "%f,%f,%f") is 4 times slower. |
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151 idx := strings.IndexByte(text, ',') |
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152 if idx == -1 { |
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153 log.Printf("format error in line %d\n", line) |
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154 continue |
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155 } |
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156 var err error |
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157 if p.X, err = strconv.ParseFloat(text[:idx], 64); err != nil { |
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158 log.Printf("format error in line %d: %v\n", line, err) |
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159 continue |
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160 } |
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161 text = text[idx+1:] |
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162 if idx = strings.IndexByte(text, ','); idx == -1 { |
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163 log.Printf("format error in line %d\n", line) |
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164 continue |
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165 } |
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166 if p.Y, err = strconv.ParseFloat(text[:idx], 64); err != nil { |
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167 log.Printf("format error in line %d: %v\n", line, err) |
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168 continue |
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169 } |
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170 text = text[idx+1:] |
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171 if p.Z, err = strconv.ParseFloat(text, 64); err != nil { |
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172 log.Printf("format error in line %d: %v\n", line, err) |
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173 continue |
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174 } |
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175 mpz = append(mpz, p) |
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176 } |
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177 |
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178 if err := s.Err(); err != nil { |
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179 return nil, err |
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180 } |
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181 |
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182 return mpz, nil |
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183 } |
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184 |
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185 func loadXYZ(f *zip.File) (octree.MultiPointZ, error) { |
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186 r, err := f.Open() |
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187 if err != nil { |
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188 return nil, err |
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189 } |
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190 defer r.Close() |
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191 return loadXYZReader(r) |
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192 } |
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193 |
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194 func loadBoundary(z *zip.ReadCloser) (Polygon, error) { |
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195 shpF := find(".shp", z.File) |
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196 if shpF == nil { |
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197 return nil, nil |
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198 } |
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199 prefix := strings.TrimSuffix(shpF.Name, path.Ext(shpF.Name)) |
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200 dbfF := find(prefix+".dbf", z.File) |
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201 if dbfF == nil { |
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202 return nil, fmt.Errorf("No DBF file found for %s", shpF.Name) |
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203 } |
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204 |
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205 shpR, err := shpF.Open() |
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206 if err != nil { |
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207 return nil, err |
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208 } |
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209 |
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210 dbfR, err := dbfF.Open() |
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211 if err != nil { |
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212 shpR.Close() |
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213 return nil, err |
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214 } |
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215 sr := shp.SequentialReaderFromExt(shpR, dbfR) |
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216 defer sr.Close() |
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217 |
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218 if !sr.Next() { |
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219 return nil, sr.Err() |
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220 } |
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221 |
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222 _, s := sr.Shape() |
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223 if s == nil { |
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224 return nil, sr.Err() |
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225 } |
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226 |
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227 return shapeToPolygon(s) |
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228 } |
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229 |
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230 func (sr *SoundingResult) Do(conn *sql.Conn) error { |
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231 |
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232 z, err := zip.OpenReader(sr.zip) |
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233 if err != nil { |
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234 return err |
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235 } |
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236 defer z.Close() |
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237 |
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238 mf := find("meta.json", z.File) |
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239 if mf == nil { |
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240 return errors.New("Cannot find 'meta.json'") |
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241 } |
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242 |
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243 m, err := loadMeta(mf) |
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244 if err != nil { |
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245 return err |
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246 } |
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247 |
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248 if err := m.validate(conn); err != nil { |
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249 return err |
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250 } |
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251 |
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252 xyzf := find(".xyz", z.File) |
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253 if xyzf == nil { |
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254 return errors.New("Cannot find any *.xyz file") |
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255 } |
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256 |
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257 xyz, err := loadXYZ(xyzf) |
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258 if err != nil { |
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259 return err |
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260 } |
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261 |
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262 if len(xyz) == 0 { |
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263 return errors.New("XYZ does not contain any vertices.") |
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264 } |
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265 |
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266 // Is there a boundary shapefile in the ZIP archive? |
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267 polygon, err := loadBoundary(z) |
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268 if err != nil { |
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269 return err |
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270 } |
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271 |
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272 tx, err := conn.BeginTx(context.Background(), nil) |
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273 if err != nil { |
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274 return err |
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275 } |
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276 defer tx.Rollback() |
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277 |
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278 var id int64 |
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279 var epsg uint32 |
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280 |
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281 if err := tx.QueryRow(insertPointsSQL, |
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282 m.Bottleneck, |
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283 m.Date.Time, |
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284 m.DepthReference, |
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285 xyz.AsWKB(), |
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286 polygon.AsWBK(), |
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287 m.EPSG, |
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288 ).Scan(&id, &epsg); err != nil { |
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289 return err |
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290 } |
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291 |
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292 log.Printf("EPSG: %d\n", epsg) |
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293 |
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294 // TODO: Build octree |
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295 // TODO: Generate iso-lines |
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296 |
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297 return tx.Commit() |
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298 } |