Mercurial > gemma
comparison pkg/imports/wkb.go @ 4313:5da02dcc51f6
shape upload stretch import: Started to decode geometries and attributes from uploaded shape file.
| author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Tue, 03 Sep 2019 16:54:33 +0200 |
| parents | 8b75ac5e243e |
| children | 046a07a33b19 |
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| 4312:8926fc81e4de | 4313:5da02dcc51f6 |
|---|---|
| 51 binary.Write(buf, binary.LittleEndian, math.Float64bits(lat)) | 51 binary.Write(buf, binary.LittleEndian, math.Float64bits(lat)) |
| 52 binary.Write(buf, binary.LittleEndian, math.Float64bits(lon)) | 52 binary.Write(buf, binary.LittleEndian, math.Float64bits(lon)) |
| 53 } | 53 } |
| 54 | 54 |
| 55 return buf.Bytes() | 55 return buf.Bytes() |
| 56 } | |
| 57 | |
| 58 func (ls lineSlice) LinearRingGeom() wkb.LinearRingGeom { | |
| 59 lr := make(wkb.LinearRingGeom, len(ls)) | |
| 60 for i, v := range ls { | |
| 61 lr[i].X = v[0] | |
| 62 lr[i].Y = v[1] | |
| 63 } | |
| 64 return lr | |
| 56 } | 65 } |
| 57 | 66 |
| 58 func (p pointSlice) asWKB() []byte { | 67 func (p pointSlice) asWKB() []byte { |
| 59 | 68 |
| 60 size := 1 + 4 + 2*8 | 69 size := 1 + 4 + 2*8 |
| 145 } | 154 } |
| 146 out[i] = line | 155 out[i] = line |
| 147 } | 156 } |
| 148 return out | 157 return out |
| 149 } | 158 } |
| 159 | |
| 160 func (ps polygonSlice) MultiPolygonGeom() wkb.MultiPolygonGeom { | |
| 161 | |
| 162 var mp wkb.MultiPolygonGeom | |
| 163 var curr wkb.PolygonGeom | |
| 164 | |
| 165 for _, r := range ps { | |
| 166 lr := lineSlice(r).LinearRingGeom() | |
| 167 // A counter clockwise ring starts a new polygon. | |
| 168 if lr.CCW() { | |
| 169 if len(curr) > 0 { | |
| 170 mp = append(mp, curr) | |
| 171 curr = wkb.PolygonGeom{} | |
| 172 } | |
| 173 } | |
| 174 curr = append(curr, lr) | |
| 175 } | |
| 176 | |
| 177 if len(curr) > 0 { | |
| 178 mp = append(mp, curr) | |
| 179 } | |
| 180 | |
| 181 return mp | |
| 182 } |