Add point cloud resampling export

app/api/tiler.py

@@ -524,6 +524,7 @@ class Export(TaskNestedView):
         epsg = request.data.get('epsg')
         color_map = request.data.get('color_map')
         hillshade = request.data.get('hillshade')
+        resample = request.data.get('resample')
 
         if formula == '': formula = None
         if bands == '': bands = None
@@ -531,6 +532,7 @@ class Export(TaskNestedView):
         if epsg == '': epsg = None
         if color_map == '': color_map = None
         if hillshade == '': hillshade = None
+        if resample == '': resample = None
 
         expr = None
 
@@ -552,6 +554,12 @@ class Export(TaskNestedView):
             except InvalidColorMapName:
                 raise exceptions.ValidationError(_("Not a valid color_map value"))
 
+        if resample is not None:
+            try:
+                resample = float(resample)
+            except ValueError:
+                raise exceptions.ValidationError(_("Invalid resample value: %(value)s") % {'value': resample})
+
         if epsg is not None:
             try:
                 epsg = int(epsg)
@@ -627,9 +635,10 @@ class Export(TaskNestedView):
                 return Response({'celery_task_id': celery_task_id, 'filename': filename})
         elif asset_type == 'georeferenced_model':
             # Shortcut the process if no processing is required
-            if export_format == 'laz' and (epsg == task.epsg or epsg is None):
+            if export_format == 'laz' and (epsg == task.epsg or epsg is None) and (resample is None or resample == 0):
                 return Response({'url': '/api/projects/{}/tasks/{}/download/{}.laz'.format(task.project.id, task.id, asset_type), 'filename': filename})
             else:
                 celery_task_id = export_pointcloud.delay(url, epsg=epsg, 
-                                                            format=export_format).task_id
+                                                            format=export_format,
+                                                            resample=resample).task_id
                 return Response({'celery_task_id': celery_task_id, 'filename': filename})

app/pointcloud_utils.py

@@ -10,19 +10,24 @@ logger = logging.getLogger('app.logger')
 def export_pointcloud(input, output, **opts):
     epsg = opts.get('epsg')
     export_format = opts.get('format')
+    resample = float(opts.get('resample', 0))
 
+    resample_args = []
     reprojection_args = []
     extra_args = []
 
     if epsg:
         reprojection_args = ["reprojection",
                             "--filters.reprojection.out_srs=%s" % double_quote("EPSG:" + str(epsg))]
-    
+
     if export_format == "ply":
         extra_args = ['--writers.ply.sized_types', 'false',
                       '--writers.ply.storage_mode', 'little endian']
 
-    subprocess.check_output(["pdal", "translate", input, output] + reprojection_args + extra_args)
+    if resample > 0:
+        resample_args = ['sample', '--filters.sample.radius=%s' % resample]
+
+    subprocess.check_output(["pdal", "translate", input, output] + resample_args + reprojection_args + extra_args)
 
 
 def is_pointcloud_georeferenced(laz_path):

app/static/app/js/components/ExportAssetPanel.jsx

@@ -75,6 +75,7 @@ export default class ExportAssetPanel extends React.Component {
         format: props.exportFormats[0],
         epsg: this.props.task.epsg || null,
         customEpsg: Storage.getItem("last_export_custom_epsg") || "4326",
+        resample: 0,
         exporting: false
     }
   }
@@ -97,6 +98,10 @@ export default class ExportAssetPanel extends React.Component {
     this.setState({customEpsg: e.target.value});
   }
 
+  handleChangeResample = e => {
+    this.setState({resample: parseFloat(e.target.value) || 0});
+  }
+
   getExportParams = (format) => {
       let params = {};
 
@@ -111,9 +116,15 @@ export default class ExportAssetPanel extends React.Component {
       const epsg = this.getEpsg();
       if (epsg) params.epsg = this.getEpsg();
 
+      if (this.state.resample > 0) params.resample = this.state.resample;
+
       return params;
   }
 
+  isPointCloud = () => {
+    return this.props.asset == "georeferenced_model";
+  }
+
   handleExport = (format) => {
     if (!format) format = this.state.format;
 
@@ -171,7 +182,7 @@ export default class ExportAssetPanel extends React.Component {
   }
 
   render(){
-    const {epsg, customEpsg, exporting, format } = this.state;
+    const {epsg, customEpsg, exporting, format, resample } = this.state;
     const { exportFormats } = this.props;
     const utmEPSG = this.props.task.epsg;
 
@@ -200,14 +211,21 @@ export default class ExportAssetPanel extends React.Component {
 
   let exportSelector = null;
   if (this.props.selectorOnly){
-    exportSelector = (<div className="row form-group form-inline">
+    exportSelector = [<div key={1} className="row form-group form-inline">
         <label className="col-sm-3 control-label">{_("Format:")}</label>
         <div className="col-sm-9 ">
         <select className="form-control" value={format} onChange={this.handleSelectFormat}>
             {exportFormats.map(ef => <option key={ef} value={ef}>{this.efInfo[ef].label}</option>)}
         </select>
         </div>
-    </div>);
+    </div>,
+    this.isPointCloud() ? <div key={2} className="row form-group form-inline">
+        <label className="col-sm-3 control-label">{_("Resample (meters):")}</label>
+        <div className="col-sm-9 ">
+          <input type="number" min="0" className="form-control custom-interval" value={resample} onChange={this.handleChangeResample} />
+        </div>
+      </div>
+    : ""];
   }else{
     exportSelector = (<div className="row form-group form-inline">
         <label className="col-sm-3 control-label">{_("Export:")}</label>

app/tests/test_api_export.py

@@ -82,7 +82,8 @@ class TestApiTask(BootTransactionTestCase):
                 ('orthophoto', {'formula': 'NDVI', 'bands': 'RGN'}, status.HTTP_200_OK),
                 ('dsm', {'epsg': 4326}, status.HTTP_200_OK),
                 ('dtm', {'epsg': 4326}, status.HTTP_200_OK),
-                ('georeferenced_model', {'epsg': 4326}, status.HTTP_200_OK)
+                ('georeferenced_model', {'epsg': 4326}, status.HTTP_200_OK),
+                ('georeferenced_model', {'epsg': 4326, 'resample': 2.5}, status.HTTP_200_OK)
             ]
 
             # Cannot export stuff