Mercurial > gemma
annotate pkg/models/cross.go @ 1199:181b8a947ecd
fixed property of null bug
author | Markus Kottlaender <markus@intevation.de> |
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date | Mon, 19 Nov 2018 08:51:44 +0100 |
parents | a244b18cb916 |
children | 19108851af13 |
rev | line source |
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1017
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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 models |
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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 "encoding/json" |
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20 "errors" |
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21 "fmt" |
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22 "math" |
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23 "time" |
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24 ) |
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25 |
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26 type ( |
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27 GeoJSONFeature string |
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28 GeoJSONLineStringType string |
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29 |
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30 GeoJSONDate struct{ time.Time } |
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31 |
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32 GeoJSONLineString struct { |
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33 Type GeoJSONLineStringType `json:"type"` |
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34 } |
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35 |
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36 GeoJSONCoordinate struct { |
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37 Lat float64 |
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38 Lon float64 |
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39 } |
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40 |
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41 GeoJSONCoordinateZ struct { |
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42 Lat float64 |
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43 Lon float64 |
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44 Z float64 |
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45 } |
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46 |
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47 CrossSectionInputProperties struct { |
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48 Bottleneck string `json:"bottleneck"` |
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49 Date GeoJSONDate `json:"date"` |
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50 } |
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51 |
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52 GeoJSONLineCoordinates []GeoJSONCoordinate |
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53 GeoJSONLineCoordinatesZ []GeoJSONCoordinateZ |
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54 |
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55 GeoJSONMultiLineCoordinatesZ []GeoJSONLineCoordinatesZ |
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56 |
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57 CrossSectionInputGeometry struct { |
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58 Type GeoJSONLineStringType `json:"type"` |
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59 Coordinates GeoJSONLineCoordinates `json:"coordinates"` |
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60 } |
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61 |
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62 CrossSectionInput struct { |
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63 Type GeoJSONFeature `json:"type"` |
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64 Geometry CrossSectionInputGeometry `json:"geometry"` |
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65 Properties CrossSectionInputProperties `json:"properties"` |
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66 } |
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67 |
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68 CrossSectionOutputGeometry struct { |
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69 Type string `json:"type"` |
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70 Coordinates GeoJSONMultiLineCoordinatesZ `json:"coordinates"` |
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71 } |
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72 |
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73 CrossSectionOutput struct { |
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74 Type string `json:"type"` |
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75 Geometry CrossSectionOutputGeometry `json:"geometry"` |
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76 Properties map[string]interface{} `json:"properties"` |
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77 } |
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78 ) |
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79 |
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80 var ( |
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81 errNoGeoJSONFeature = errors.New("Not a valid GeoJSON feature") |
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82 errNoGeoJSONLineStringType = errors.New("Not a valid GeoJSON linestring type") |
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83 errTooLessComponents = errors.New("Too less components in coordinate") |
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84 errTooLessCoordinates = errors.New("Too less coordinates") |
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85 ) |
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86 |
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87 func (lc *GeoJSONLineCoordinates) UnmarshalJSON(data []byte) error { |
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88 var coords []GeoJSONCoordinate |
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89 if err := json.Unmarshal(data, &coords); err != nil { |
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90 return err |
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91 } |
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92 if len(coords) < 2 { |
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93 return errTooLessCoordinates |
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94 } |
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95 *lc = GeoJSONLineCoordinates(coords) |
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96 return nil |
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97 } |
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98 |
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99 func (d *GeoJSONDate) UnmarshalJSON(data []byte) error { |
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100 var s string |
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101 if err := json.Unmarshal(data, &s); err != nil { |
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102 return err |
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103 } |
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104 t, err := time.Parse("2006-01-02", s) |
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105 if err != nil { |
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106 return err |
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107 } |
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108 *d = GeoJSONDate{t} |
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109 return nil |
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110 } |
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111 |
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112 func (c *GeoJSONCoordinate) UnmarshalJSON(data []byte) error { |
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113 var pos []float64 |
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114 if err := json.Unmarshal(data, &pos); err != nil { |
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115 return err |
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116 } |
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117 if len(pos) < 2 { |
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118 return errTooLessComponents |
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119 } |
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120 *c = GeoJSONCoordinate{Lat: pos[0], Lon: pos[1]} |
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121 return nil |
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122 } |
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123 |
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124 func (t *GeoJSONFeature) UnmarshalJSON(data []byte) error { |
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125 var s string |
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126 if err := json.Unmarshal(data, &s); err != nil { |
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127 return err |
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128 } |
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129 if s != "Feature" { |
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130 return errNoGeoJSONFeature |
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131 } |
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132 *t = GeoJSONFeature(s) |
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133 return nil |
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134 } |
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135 |
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136 func (t *GeoJSONLineStringType) UnmarshalJSON(data []byte) error { |
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137 var s string |
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138 if err := json.Unmarshal(data, &s); err != nil { |
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139 return err |
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140 } |
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141 if s != "LineString" { |
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142 return errNoGeoJSONLineStringType |
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143 } |
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144 *t = GeoJSONLineStringType(s) |
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145 return nil |
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146 } |
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147 |
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148 const ( |
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149 wkbXDR byte = 0 |
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150 wkbNDR byte = 1 |
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151 wkbLineString uint32 = 2 |
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152 wkbLineStringZ uint32 = 1000 + 2 |
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153 wkbMultiLineStringZ uint32 = 1000 + 5 |
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154 ) |
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155 |
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156 func (lc GeoJSONLineCoordinates) AsWKB() []byte { |
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157 |
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158 size := 1 + 4 + 4 + len(lc)*(1+4+2*8) |
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159 |
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160 buf := bytes.NewBuffer(make([]byte, 0, size)) |
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161 |
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162 binary.Write(buf, binary.LittleEndian, wkbNDR) |
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163 binary.Write(buf, binary.LittleEndian, wkbLineString) |
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164 binary.Write(buf, binary.LittleEndian, uint32(len(lc))) |
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165 |
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166 for i := range lc { |
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167 c := &lc[i] |
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168 binary.Write(buf, binary.LittleEndian, math.Float64bits(c.Lat)) |
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169 binary.Write(buf, binary.LittleEndian, math.Float64bits(c.Lon)) |
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170 } |
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171 |
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172 return buf.Bytes() |
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173 } |
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174 |
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175 func (cz GeoJSONCoordinateZ) MarshalJSON() ([]byte, error) { |
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176 var buf bytes.Buffer |
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177 fmt.Fprintf(&buf, "[%.8f,%.8f,%.8f]", cz.Lat, cz.Lon, cz.Z) |
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178 return buf.Bytes(), nil |
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179 } |
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180 |
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181 func (lcz *GeoJSONLineCoordinatesZ) Scan(src interface{}) error { |
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182 data, ok := src.([]byte) |
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183 if !ok { |
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184 return errNoByteSlice |
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185 } |
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186 return lcz.FromWKB(data) |
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187 } |
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188 |
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189 func (lcz *GeoJSONLineCoordinatesZ) FromWKB(data []byte) error { |
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190 |
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191 r := bytes.NewReader(data) |
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192 |
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193 endian, err := r.ReadByte() |
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194 |
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195 var order binary.ByteOrder |
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196 |
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197 switch { |
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198 case err != nil: |
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199 return err |
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200 case endian == wkbNDR: |
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201 order = binary.LittleEndian |
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202 case endian == wkbXDR: |
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203 order = binary.BigEndian |
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204 default: |
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205 return fmt.Errorf("unknown byte order %x", endian) |
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206 } |
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207 |
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208 var geomType uint32 |
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209 err = binary.Read(r, order, &geomType) |
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210 |
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211 switch { |
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212 case err != nil: |
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213 return err |
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214 case geomType != wkbLineStringZ: |
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215 return fmt.Errorf("unknown geometry type %x", geomType) |
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216 } |
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217 |
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218 var num uint32 |
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219 if err = binary.Read(r, order, &num); err != nil { |
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220 return err |
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221 } |
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222 |
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223 coords := make(GeoJSONLineCoordinatesZ, num) |
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224 |
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225 for i := range coords { |
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226 c := &coords[i] |
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227 for _, addr := range []*float64{&c.Lat, &c.Lon, &c.Z} { |
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228 if err = binary.Read(r, order, addr); err != nil { |
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229 return err |
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230 } |
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231 } |
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232 } |
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233 |
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234 *lcz = coords |
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235 |
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236 return nil |
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237 } |
648
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238 |
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239 func (cz GeoJSONCoordinateZ) Equals(other GeoJSONCoordinateZ) bool { |
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240 const ( |
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241 xyEps = 1e-7 |
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242 zEps = 1e-5 |
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243 ) |
651
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244 return math.Abs(cz.Lat-other.Lat) < xyEps && |
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245 math.Abs(cz.Lon-other.Lon) < xyEps && |
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246 math.Abs(cz.Z-other.Z) < zEps |
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247 } |
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248 |
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249 func (cz GeoJSONCoordinateZ) mid(other GeoJSONCoordinateZ) GeoJSONCoordinateZ { |
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250 return GeoJSONCoordinateZ{ |
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251 Lon: (cz.Lon + other.Lon) * 0.5, |
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252 Lat: (cz.Lat + other.Lat) * 0.5, |
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253 Z: (cz.Z + other.Z) * 0.5, |
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254 } |
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255 } |
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256 |
652
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257 func deg2rad(d float64) float64 { return d * math.Pi / 180.0 } |
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258 |
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259 func (cz GeoJSONCoordinateZ) Distance(other GeoJSONCoordinateZ) float64 { |
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260 |
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261 const EarthRadius = 6378137.0 |
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262 |
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263 dLat := deg2rad(other.Lat - cz.Lat) |
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264 dLng := math.Abs(deg2rad(other.Lon - cz.Lon)) |
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265 |
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266 if dLng > math.Pi { |
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267 dLng = 2*math.Pi - dLng |
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268 } |
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269 |
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270 x := dLng * math.Cos(deg2rad((cz.Lat+other.Lat)/2.0)) |
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271 return math.Sqrt(dLat*dLat+x*x) * EarthRadius |
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272 } |
808
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273 |
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274 func (mls *GeoJSONMultiLineCoordinatesZ) FromWKB(data []byte) error { |
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275 r := bytes.NewReader(data) |
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276 |
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277 var order binary.ByteOrder |
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278 |
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279 endian, err := r.ReadByte() |
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280 |
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281 switch { |
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282 case err != nil: |
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283 return err |
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284 case endian == wkbNDR: |
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285 order = binary.LittleEndian |
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286 case endian == wkbXDR: |
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287 order = binary.BigEndian |
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288 default: |
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289 return fmt.Errorf("unknown byte order %x", endian) |
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290 } |
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291 |
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292 var geomType uint32 |
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293 err = binary.Read(r, order, &geomType) |
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294 |
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295 switch { |
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296 case err != nil: |
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297 return err |
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298 case geomType != wkbMultiLineStringZ: |
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299 return fmt.Errorf("unknown geometry type %d", geomType) |
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300 } |
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301 |
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302 var numLines uint32 |
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303 if err = binary.Read(r, order, &numLines); err != nil { |
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304 return err |
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305 } |
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306 |
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307 lines := make(GeoJSONMultiLineCoordinatesZ, numLines) |
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308 |
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309 for i := range lines { |
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310 endian, err = r.ReadByte() |
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311 |
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312 switch { |
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313 case err != nil: |
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314 return err |
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315 case endian == wkbNDR: |
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316 order = binary.LittleEndian |
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317 case endian == wkbXDR: |
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318 order = binary.BigEndian |
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319 default: |
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320 return fmt.Errorf("unknown byte order %x", endian) |
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321 } |
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322 |
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323 err = binary.Read(r, order, &geomType) |
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324 switch { |
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325 case err != nil: |
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326 return err |
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327 case geomType != wkbLineStringZ: |
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Cross sections: Clip result against area of the sounding result.
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328 return fmt.Errorf("unknown geometry type %d", geomType) |
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Cross sections: Clip result against area of the sounding result.
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329 } |
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Cross sections: Clip result against area of the sounding result.
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330 |
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Cross sections: Clip result against area of the sounding result.
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331 var numPoints uint32 |
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332 if err = binary.Read(r, order, &numPoints); err != nil { |
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333 return err |
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Cross sections: Clip result against area of the sounding result.
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parents:
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334 } |
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Cross sections: Clip result against area of the sounding result.
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parents:
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335 |
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336 points := make(GeoJSONLineCoordinatesZ, numPoints) |
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337 for j := range points { |
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Cross sections: Clip result against area of the sounding result.
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338 var lat, lon, z uint64 |
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339 if err = binary.Read(r, order, &lat); err != nil { |
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340 return err |
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341 } |
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342 if err = binary.Read(r, order, &lon); err != nil { |
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parents:
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343 return err |
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parents:
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344 } |
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345 if err = binary.Read(r, order, &z); err != nil { |
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346 return err |
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347 } |
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348 c := &points[j] |
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349 c.Lat = math.Float64frombits(lat) |
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350 c.Lon = math.Float64frombits(lon) |
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351 c.Z = math.Float64frombits(z) |
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parents:
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352 } |
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353 lines[i] = points |
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354 } |
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parents:
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355 |
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356 *mls = lines |
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357 |
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358 return nil |
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parents:
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359 } |
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Cross sections: Clip result against area of the sounding result.
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parents:
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360 |
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Cross sections: Clip result against area of the sounding result.
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parents:
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361 func (mls *GeoJSONMultiLineCoordinatesZ) Scan(src interface{}) error { |
895
3bb275235c89
Let GeoJSONMultiLineCoordinatesZ be nil when scanned from DB.
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parents:
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362 if src == nil { |
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Let GeoJSONMultiLineCoordinatesZ be nil when scanned from DB.
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parents:
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363 return nil |
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Let GeoJSONMultiLineCoordinatesZ be nil when scanned from DB.
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parents:
808
diff
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364 } |
808
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Cross sections: Clip result against area of the sounding result.
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parents:
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365 data, ok := src.([]byte) |
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Cross sections: Clip result against area of the sounding result.
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parents:
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diff
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366 if !ok { |
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Cross sections: Clip result against area of the sounding result.
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parents:
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diff
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367 return errNoByteSlice |
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Cross sections: Clip result against area of the sounding result.
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parents:
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diff
changeset
|
368 } |
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Cross sections: Clip result against area of the sounding result.
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parents:
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diff
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369 return mls.FromWKB(data) |
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Cross sections: Clip result against area of the sounding result.
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parents:
801
diff
changeset
|
370 } |