MetadataNode DeltaKernel::dumpDetail(PointViewPtr& srcView,
PointViewPtr& candView, KD3Index& index, DimIndexMap& dims)
{
MetadataNode root;
for (PointId id = 0; id < srcView->size(); ++id)
{
double x = srcView->getFieldAs<double>(Dimension::Id::X, id);
double y = srcView->getFieldAs<double>(Dimension::Id::Y, id);
double z = srcView->getFieldAs<double>(Dimension::Id::Z, id);
PointId candId = index.neighbor(x, y, z);
MetadataNode delta = root.add("delta");
delta.add("i", id);
for (auto di = dims.begin(); di != dims.end(); ++di)
{
DimIndex& d = di->second;
double sv = srcView->getFieldAs<double>(d.m_srcId, id);
double cv = candView->getFieldAs<double>(d.m_candId, candId);
delta.add(d.m_name, sv - cv);
}
}
return root;
}
MetadataNode InfoKernel::dumpSummary(const QuickInfo& qi)
{
MetadataNode summary;
summary.add("num_points", qi.m_pointCount);
summary.add("spatial_reference", qi.m_srs.getWKT());
MetadataNode bounds = summary.add("bounds");
MetadataNode x = bounds.add("X");
x.add("min", qi.m_bounds.minx);
x.add("max", qi.m_bounds.maxx);
MetadataNode y = bounds.add("Y");
y.add("min", qi.m_bounds.miny);
y.add("max", qi.m_bounds.maxy);
MetadataNode z = bounds.add("Z");
z.add("min", qi.m_bounds.minz);
z.add("max", qi.m_bounds.maxz);
std::string dims;
auto di = qi.m_dimNames.begin();
while (di != qi.m_dimNames.end())
{
dims += *di;
++di;
if (di != qi.m_dimNames.end())
dims += ", ";
}
summary.add("dimensions", dims);
return summary;
}
PointViewPtr IcpFilter::icp(PointViewPtr fixed, PointViewPtr moving) const
{
typedef pcl::PointXYZ Point;
typedef pcl::PointCloud<Point> Cloud;
Cloud::Ptr fixedCloud(new Cloud());
pclsupport::PDALtoPCD(fixed, *fixedCloud);
Cloud::Ptr movingCloud(new Cloud());
pclsupport::PDALtoPCD(moving, *movingCloud);
pcl::IterativeClosestPoint<Point, Point> icp;
icp.setInputSource(movingCloud);
icp.setInputTarget(fixedCloud);
Cloud result;
icp.align(result);
MetadataNode root = getMetadata();
// I couldn't figure out the template-fu to get
// `MetadataNodeImpl::setValue` to work for all Eigen matrices with one
// function, so I'm just brute-forcing the cast for now.
root.add("transform",
Eigen::MatrixXd(icp.getFinalTransformation().cast<double>()));
root.add("converged", icp.hasConverged());
root.add("fitness", icp.getFitnessScore());
assert(moving->size() == result.points.size());
for (PointId i = 0; i < moving->size(); ++i)
{
moving->setField(Dimension::Id::X, i, result.points[i].x);
moving->setField(Dimension::Id::Y, i, result.points[i].y);
moving->setField(Dimension::Id::Z, i, result.points[i].z);
}
return moving;
}
TEST(XMLSchemaTest, copy)
{
using namespace pdal;
std::string xml = ReadXML(TestConfig::dataPath() +
"../../schemas/16-dim-schema.xml");
std::string xsd = ReadXML(TestConfig::dataPath() + "../../schemas/LAS.xsd");
XMLSchema s1(xml, xsd);
PointTable table;
XMLDimList dims = s1.xmlDims();
for (auto di = dims.begin(); di != dims.end(); ++di)
{
Dimension::Id id =
table.layout()->registerOrAssignDim(
di->m_name,
di->m_dimType.m_type);
s1.setId(di->m_name, id);
}
MetadataNode m;
MetadataNode m1 = m.add("m1", 1u);
MetadataNode m2 = m.add("m2", 1);
MetadataNode m1prime = m.add("m1prime", "Some other metadata");
m1.add("uuid", Uuid());
XMLSchema s2(s1.xmlDims(), m);
std::string xml_output = s2.xml();
XMLSchema s3(xml_output, xsd);
XMLDimList dims3 = s3.xmlDims();
EXPECT_EQ(dims.size(), dims3.size());
auto di1 = dims.begin();
auto di3 = dims3.begin();
while (di1 != dims.end() && di3 != dims3.end())
{
XMLDim& dim1 = *di1;
XMLDim& dim3 = *di3;
EXPECT_EQ(dim1.m_name, dim3.m_name);
EXPECT_EQ(dim1.m_dimType.m_type, dim3.m_dimType.m_type);
di1++;
di3++;
}
}
void StatsFilter::extractMetadata(PointTableRef table)
{
uint32_t position(0);
for (auto di = m_stats.begin(); di != m_stats.end(); ++di)
{
const Summary& s = di->second;
MetadataNode t = m_metadata.addList("statistic");
t.add("position", position++);
s.extractMetadata(t);
}
// If we have X, Y, & Z dims, output bboxes
auto xs = m_stats.find(Dimension::Id::X);
auto ys = m_stats.find(Dimension::Id::Y);
auto zs = m_stats.find(Dimension::Id::Z);
if (xs != m_stats.end() &&
ys != m_stats.end() &&
zs != m_stats.end())
{
BOX3D box(xs->second.minimum(), ys->second.minimum(), zs->second.minimum(),
xs->second.maximum(), ys->second.maximum(), zs->second.maximum());
pdal::Polygon p(box);
MetadataNode mbox = Utils::toMetadata(box);
MetadataNode box_metadata = m_metadata.add("bbox");
MetadataNode metadata = box_metadata.add("native");
MetadataNode boundary = metadata.add("boundary", p.json());
MetadataNode bbox = metadata.add(mbox);
SpatialReference ref = table.anySpatialReference();
// if we don't get an SRS from the PointTableRef,
// we won't add another metadata node
if (!ref.empty())
{
p.setSpatialReference(ref);
SpatialReference epsg4326("EPSG:4326");
pdal::Polygon pdd = p.transform(epsg4326);
BOX3D ddbox = pdd.bounds();
MetadataNode epsg_4326_box = Utils::toMetadata(ddbox);
MetadataNode dddbox = box_metadata.add("EPSG:4326");
dddbox.add(epsg_4326_box);
MetadataNode ddboundary = dddbox.add("boundary", pdd.json());
}
}
}
void Stage::setSpatialReference(MetadataNode& m,
const SpatialReference& spatialRef)
{
m_spatialReference = spatialRef;
auto pred = [](MetadataNode m){ return m.name() == "spatialreference"; };
MetadataNode spatialNode = m.findChild(pred);
if (spatialNode.empty())
{
m.add(spatialRef.toMetadata());
m.add("spatialreference", spatialRef.getWKT(), "SRS of this stage");
m.add("comp_spatialreference", spatialRef.getWKT(),
"SRS of this stage");
}
}
MetadataNode PointView::toMetadata() const
{
MetadataNode node;
const Dimension::IdList& dims = layout()->dims();
for (PointId idx = 0; idx < size(); idx++)
{
MetadataNode pointnode = node.add(std::to_string(idx));
for (auto di = dims.begin(); di != dims.end(); ++di)
{
double v = getFieldAs<double>(*di, idx);
pointnode.add(layout()->dimName(*di), v);
}
}
return node;
}
inline MetadataNode toMetadata(const PointViewPtr view)
{
MetadataNode node;
const Dimension::IdList& dims = view->dims();
for (PointId idx = 0; idx < view->size(); idx++)
{
MetadataNode pointnode = node.add(std::to_string(idx));
for (auto di = dims.begin(); di != dims.end(); ++di)
{
double v = view->getFieldAs<double>(*di, idx);
pointnode.add(Dimension::name(*di), v);
}
}
return node;
}
void InfoKernel::dump(MetadataNode& root)
{
if (m_showSchema)
root.add(m_manager->pointTable().toMetadata().clone("schema"));
if (m_PointCloudSchemaOutput.size() > 0)
{
#ifdef PDAL_HAVE_LIBXML2
XMLSchema schema(m_manager->pointTable().layout());
std::ostream *out = FileUtils::createFile(m_PointCloudSchemaOutput);
std::string xml(schema.xml());
out->write(xml.c_str(), xml.size());
FileUtils::closeFile(out);
#else
std::cerr << "libxml2 support not enabled, no schema is produced" <<
std::endl;
#endif
}
if (m_showStats)
root.add(m_statsStage->getMetadata().clone("stats"));
if (m_pipelineFile.size() > 0)
PipelineWriter::writePipeline(m_manager->getStage(), m_pipelineFile);
if (m_pointIndexes.size())
{
PointViewSet viewSet = m_manager->views();
assert(viewSet.size() == 1);
root.add(dumpPoints(*viewSet.begin()).clone("points"));
}
if (m_queryPoint.size())
{
PointViewSet viewSet = m_manager->views();
assert(viewSet.size() == 1);
root.add(dumpQuery(*viewSet.begin()));
}
if (m_showMetadata)
{
// If we have a reader cached, this means we
// weren't reading a pipeline file directly. In that
// case, use the metadata from the reader (old behavior).
// Otherwise, return the full metadata of the entire pipeline
if (m_reader)
root.add(m_reader->getMetadata().clone("metadata"));
else
root.add(m_manager->getMetadata().clone("metadata"));
}
if (m_boundary)
{
PointViewSet viewSet = m_manager->views();
assert(viewSet.size() == 1);
root.add(m_hexbinStage->getMetadata().clone("boundary"));
}
}
void Stage::setSpatialReference(MetadataNode& m,
const SpatialReference& spatialRef)
{
m_spatialReference = spatialRef;
auto pred = [](MetadataNode m){ return m.name() == "spatialreference"; };
MetadataNode spatialNode = m.findChild(pred);
if (spatialNode.empty())
{
m.add(Utils::toMetadata(spatialRef));
m.add("spatialreference",
spatialRef.getWKT(SpatialReference::eHorizontalOnly, false),
"SRS of this stage");
m.add("comp_spatialreference",
spatialRef.getWKT(SpatialReference::eCompoundOK, false),
"SRS of this stage");
}
}
int HausdorffKernel::execute()
{
PointTable srcTable;
PointViewPtr srcView = loadSet(m_sourceFile, srcTable);
PointTable candTable;
PointViewPtr candView = loadSet(m_candidateFile, candTable);
double hausdorff = Utils::computeHausdorff(srcView, candView);
MetadataNode root;
root.add("filenames", m_sourceFile);
root.add("filenames", m_candidateFile);
root.add("hausdorff", hausdorff);
root.add("pdal_version", pdal::GetFullVersionString());
Utils::toJSON(root, std::cout);
return 0;
}
static void add(
MetadataNode& parent,
const std::string& name,
const std::string& value
)
{
Json::Value node;
Json::Reader reader;
if (reader.parse(value, node))
add(parent, name, node);
else parent.add(name, value);
}
static void add(
MetadataNode& parent,
const std::string& name,
const Json::Value& node
)
{
if (node.isNull()) { parent.add(name, ""); }
else if (node.isBool()) { parent.add(name, node.asBool()); }
else if (node.isInt()) { parent.add(name, node.asInt64()); }
else if (node.isUInt()) { parent.add(name, node.asUInt64()); }
else if (node.isDouble()) { parent.add(name, node.asDouble()); }
else if (node.isString()) { parent.add(name, node.asString()); }
else if (node.isObject())
{
MetadataNode object = parent.add(name);
for (const std::string& name: node.getMemberNames())
{
add(object, name, node[name]);
}
}
else if (node.isArray())
{
for (const Json::Value& item: node)
{
add(parent, name, item);
}
}
}
MetadataNode DeltaKernel::dump(PointViewPtr& srcView, PointViewPtr& candView,
KD3Index& index, DimIndexMap& dims)
{
MetadataNode root;
for (PointId id = 0; id < srcView->size(); ++id)
{
double x = srcView->getFieldAs<double>(Dimension::Id::X, id);
double y = srcView->getFieldAs<double>(Dimension::Id::Y, id);
double z = srcView->getFieldAs<double>(Dimension::Id::Z, id);
PointId candId = index.neighbor(x, y, z);
// It may be faster to put in a special case to avoid having to
// fetch X, Y and Z, more than once but this is simpler and
// I'm thinking in most cases it will make no practical difference.
for (auto di = dims.begin(); di != dims.end(); ++di)
{
DimIndex& d = di->second;
double sv = srcView->getFieldAs<double>(d.m_srcId, id);
double cv = candView->getFieldAs<double>(d.m_candId, candId);
accumulate(d, sv - cv);
}
}
root.add("source", m_sourceFile);
root.add("candidate", m_candidateFile);
for (auto dpair : dims)
{
DimIndex& d = dpair.second;
MetadataNode dimNode = root.add(d.m_name);
dimNode.add("min", d.m_min);
dimNode.add("max", d.m_max);
dimNode.add("mean", d.m_avg);
}
return root;
}
MetadataNode InfoKernel::run(const std::string& filename)
{
MetadataNode root;
root.add("filename", filename);
if (m_showSummary)
{
QuickInfo qi = m_reader->preview();
MetadataNode summary = dumpSummary(qi).clone("summary");
root.add(summary);
}
else
{
applyExtraStageOptionsRecursive(m_manager->getStage());
if (m_needPoints || m_showMetadata)
m_manager->execute();
else
m_manager->prepare();
dump(root);
}
root.add("pdal_version", pdal::GetFullVersionString());
return root;
}
MetadataNode InfoKernel::dumpPoints(PointViewPtr inView) const
{
MetadataNode root;
PointViewPtr outView = inView->makeNew();
// Stick points in a inViewfer.
std::vector<PointId> points = getListOfPoints(m_pointIndexes);
for (size_t i = 0; i < points.size(); ++i)
{
PointId id = (PointId)points[i];
if (id < inView->size())
outView->appendPoint(*inView.get(), id);
}
MetadataNode tree = outView->toMetadata();
std::string prefix("point ");
for (size_t i = 0; i < outView->size(); ++i)
{
MetadataNode n = tree.findChild(std::to_string(i));
n.add("PointId", points[i]);
root.add(n.clone("point"));
}
return root;
}
int DiffKernel::execute()
{
PointTable sourceTable;
Stage& source = makeReader(m_sourceFile, m_driverOverride);
source.prepare(sourceTable);
PointViewSet sourceSet = source.execute(sourceTable);
MetadataNode errors;
PointTable candidateTable;
Stage& candidate = makeReader(m_candidateFile, m_driverOverride);
candidate.prepare(candidateTable);
PointViewSet candidateSet = candidate.execute(candidateTable);
assert(sourceSet.size() == 1);
assert(candidateSet.size() == 1);
PointViewPtr sourceView = *sourceSet.begin();
PointViewPtr candidateView = *candidateSet.begin();
if (candidateView->size() != sourceView->size())
{
std::ostringstream oss;
oss << "Source and candidate files do not have the same point count";
errors.add("count.error", oss.str());
errors.add("count.candidate", candidateView->size());
errors.add("count.source", sourceView->size());
}
MetadataNode source_metadata = sourceTable.metadata();
MetadataNode candidate_metadata = candidateTable.metadata();
if (source_metadata != candidate_metadata)
{
std::ostringstream oss;
oss << "Source and candidate files do not have the same metadata count";
errors.add("metadata.error", oss.str());
errors.add(source_metadata);
errors.add(candidate_metadata);
}
if (candidateTable.layout()->dims().size() !=
sourceTable.layout()->dims().size())
{
std::ostringstream oss;
oss << "Source and candidate files do not have the same "
"number of dimensions";
}
return 0;
}
bool XMLSchema::loadMetadata(xmlNode *startNode, MetadataNode& input)
{
// Expect metadata in the following form
// We are going to skip the root element because we are
// expecting to be given one with our input
// <pc:metadata>
// <Metadata name="root" type="">
// <Metadata name="compression" type="string">lazperf</Metadata>
// <Metadata name="version" type="string">1.0</Metadata>
// </Metadata>
// </pc:metadata>
xmlNode *node = startNode;
for (node = startNode; node; node = node->next)
{
if (node->type != XML_ELEMENT_NODE)
continue;
if (std::string((const char*)node->name) == "Metadata")
{
const char *fieldname =
(const char*)xmlGetProp(node, (const xmlChar*)"name");
const char *etype =
(const char*)xmlGetProp(node, (const xmlChar*)"type");
const char *description =
(const char*)xmlGetProp(node, (const xmlChar*) "description");
const char *text = (const char*)xmlNodeGetContent(node);
if (!Utils::iequals(fieldname, "root"))
{
if (!fieldname)
{
std::cerr << "Unable to read metadata for node '" <<
(const char*)node->name << "' no \"name\" was given";
return false;
}
input.add(fieldname, text ? text : "",
description ? description : "");
}
}
loadMetadata(node->children, input);
}
return true;
}
TEST(LasWriterTest, metadata_options)
{
Options ops;
Option metadataOp("metadata", "");
Options metadataOps;
metadataOps.add("format", 4);
metadataOps.add("software_id", "MySoftwareId");
metadataOps.add("system_id", "FORWARD");
metadataOps.add("minor_version", "forward");
metadataOp.setOptions(metadataOps);
ops.add(metadataOp);
ops.add("filename", Support::temppath("wontgetwritten"));
LasWriter writer;
writer.setOptions(ops);
PointTable table;
writer.prepare(table);
MetadataNode m = writer.getMetadata();
m.add("minor_version", 56);
uint8_t format =
(uint8_t)LasTester::headerVal<unsigned>(writer, "format");
EXPECT_EQ(format, 4u);
std::string softwareId =
LasTester::headerVal<std::string>(writer, "software_id");
EXPECT_EQ(softwareId, "MySoftwareId");
std::string systemId =
LasTester::headerVal<std::string>(writer, "system_id");
// Since the option specifies forward and there is not associated
// metadata, the value should be the default.
LasHeader header;
EXPECT_EQ(systemId, header.getSystemIdentifier());
// In this case, we should have metadata to override the default.
uint8_t minorVersion =
(uint8_t)LasTester::headerVal<unsigned>(writer, "minor_version");
EXPECT_EQ(minorVersion, 56u);
}
void InfoKernel::dump(MetadataNode& root)
{
if (m_showSchema)
root.add(Utils::toMetadata(m_manager->pointTable()).clone("schema"));
if (m_PointCloudSchemaOutput.size() > 0)
{
#ifdef PDAL_HAVE_LIBXML2
XMLSchema schema(m_manager->pointTable().layout());
std::ostream *out = FileUtils::createFile(m_PointCloudSchemaOutput);
std::string xml(schema.xml());
out->write(xml.c_str(), xml.size());
FileUtils::closeFile(out);
#else
std::cerr << "libxml2 support not enabled, no schema is produced" <<
std::endl;
#endif
}
if (m_showStats)
root.add(m_statsStage->getMetadata().clone("stats"));
if (m_pipelineFile.size() > 0)
PipelineWriter::writePipeline(m_manager->getStage(), m_pipelineFile);
if (m_pointIndexes.size())
{
PointViewSet viewSet = m_manager->views();
assert(viewSet.size() == 1);
root.add(dumpPoints(*viewSet.begin()).clone("points"));
}
if (m_queryPoint.size())
{
PointViewSet viewSet = m_manager->views();
assert(viewSet.size() == 1);
root.add(dumpQuery(*viewSet.begin()));
}
if (m_showMetadata)
root.add(m_reader->getMetadata().clone("metadata"));
if (m_boundary)
{
PointViewSet viewSet = m_manager->views();
assert(viewSet.size() == 1);
root.add(m_hexbinStage->getMetadata().clone("boundary"));
}
}
void DiffKernel::checkPoints(const PointView& source_data,
const PointView& candidate_data, MetadataNode errors)
{
uint32_t MAX_BADBYTES(20);
uint32_t badbytes(0);
// Both schemas have already been determined to be equal, so are the
// same size and in the same order.
Dimension::IdList const& sourceDims = source_data.dims();
Dimension::IdList const& candidateDims = candidate_data.dims();
char sbuf[8];
char cbuf[8];
for (PointId idx = 0; idx < source_data.size(); ++idx)
{
for (size_t d = 0; d < sourceDims.size(); ++d)
{
Dimension::Id sd = sourceDims[d];
Dimension::Id cd = candidateDims[d];
source_data.getRawField(sd, idx, (void *)sbuf);
candidate_data.getRawField(cd, idx, (void *)cbuf);
Dimension::Type t = Dimension::defaultType(cd);
size_t size = Dimension::size(t);
if (memcmp(sbuf, cbuf, size))
{
std::ostringstream oss;
oss << "Point " << idx << " differs for dimension \"" <<
Dimension::name(sd) << "\" for source and candidate";
errors.add("data.error", oss.str());
badbytes++;
}
}
if (badbytes > MAX_BADBYTES )
break;
}
}
void addMetadata(PyObject *list, MetadataNode m)
{
if (!PyList_Check(list))
return;
for (Py_ssize_t i = 0; i < PyList_Size(list); ++i)
{
PyObject *tuple = PyList_GetItem(list, i);
if (!PyTuple_Check(tuple) || PyTuple_Size(tuple) != 5)
continue;
PyObject *o;
o = PyTuple_GetItem(tuple, 0);
if (!o || !PyString_Check(o))
continue;
std::string name = PyString_AsString(o);
o = PyTuple_GetItem(tuple, 1);
if (!o || !PyString_Check(o))
continue;
std::string value = PyString_AsString(o);
o = PyTuple_GetItem(tuple, 2);
if (!o || !PyString_Check(o))
continue;
std::string type = PyString_AsString(o);
if (type.empty())
type = Metadata::inferType(value);
o = PyTuple_GetItem(tuple, 3);
if (!o || !PyString_Check(o))
continue;
std::string description = PyString_AsString(o);
PyObject *submeta = PyTuple_GetItem(tuple, 4);
MetadataNode child = m.add(name, value, type, description);
if (submeta)
addMetadata(submeta, child);
}
}
void HexBin::done(PointTableRef table)
{
m_grid->processSample();
m_grid->findShapes();
m_grid->findParentPaths();
std::ostringstream offsets;
offsets << "MULTIPOINT (";
for (int i = 0; i < 6; ++i)
{
hexer::Point p = m_grid->offset(i);
offsets << p.m_x << " " << p.m_y;
if (i != 5)
offsets << ", ";
}
offsets << ")";
m_metadata.add("edge_length", m_edgeLength, "The edge length of the "
"hexagon to use in situations where you do not want to estimate "
"based on a sample");
m_metadata.add("threshold", m_density, "Minimum number of points inside "
"a hexagon to be considered full");
m_metadata.add("sample_size", m_sampleSize, "Number of samples to use "
"when estimating hexagon edge size. Specify 0.0 or omit options "
"for edge_size if you want to compute one.");
m_metadata.add("hex_offsets", offsets.str(), "Offset of hex corners from "
"hex centers.");
if (m_outputTesselation)
{
MetadataNode hexes = m_metadata.add("hexagons");
for (HexIter hi = m_grid->hexBegin(); hi != m_grid->hexEnd(); ++hi)
{
using namespace boost;
HexInfo h = *hi;
MetadataNode hex = hexes.addList("hexagon");
hex.add("density", h.density());
hex.add("gridpos", lexical_cast<std::string>(h.xgrid()) + " " +
lexical_cast<std::string>(h.ygrid()));
std::ostringstream oss;
// Using stream limits precision (default 6)
oss << "POINT (" << h.x() << " " << h.y() << ")";
hex.add("center", oss.str());
}
}
std::ostringstream polygon;
polygon.setf(std::ios_base::fixed, std::ios_base::floatfield);
polygon.precision(m_options.getValueOrDefault<uint32_t>("precision", 8));
m_grid->toWKT(polygon);
m_metadata.add("boundary", polygon.str(),
"Boundary MULTIPOLYGON of domain");
/***
We want to make these bumps on edges go away, which means that
we want to elimnate both B and C. If we take a line from A -> C,
we need the tolerance to eliminate B. After that we're left with
the triangle ACD and we want to eliminate C. The perpendicular
distance from AD to C is the hexagon height / 2, so we set the
tolerance a little larger than that. This is larger than the
perpendicular distance needed to eliminate B in ABC, so should
serve for both cases.
B ______ C
/ \
A / \ D
***/
double tolerance = 1.1 * m_grid->height() / 2;
m_metadata.add("smoothed_boundary",
Geometry::smoothPolygon(polygon.str(), tolerance),
"Smoothed boundary MULTIPOLYGON of domain");
double area = Geometry::computeArea(polygon.str());
double density = (double) m_count / area ;
m_metadata.add("density",
density,
"Number of points per square unit");
m_metadata.add("area",
area,
"Area in square units of tessellated polygon");
}
void HexBin::done(PointTableRef table)
{
m_grid->processSample();
try
{
m_grid->findShapes();
m_grid->findParentPaths();
}
catch (hexer::hexer_error& e)
{
m_metadata.add("error", e.what(),
"Hexer threw an error and was unable to compute a boundary");
m_metadata.add("boundary", "MULTIPOLYGON EMPTY",
"Empty polygon -- unable to compute boundary");
return;
}
std::ostringstream offsets;
offsets << "MULTIPOINT (";
for (int i = 0; i < 6; ++i)
{
hexer::Point p = m_grid->offset(i);
offsets << p.m_x << " " << p.m_y;
if (i != 5)
offsets << ", ";
}
offsets << ")";
m_metadata.add("edge_length", m_edgeLength, "The edge length of the "
"hexagon to use in situations where you do not want to estimate "
"based on a sample");
m_metadata.add("estimated_edge", m_grid->height(),
"Estimated computed edge distance");
m_metadata.add("threshold", m_grid->denseLimit(),
"Minimum number of points inside a hexagon to be considered full");
m_metadata.add("sample_size", m_sampleSize, "Number of samples to use "
"when estimating hexagon edge size. Specify 0.0 or omit options "
"for edge_size if you want to compute one.");
m_metadata.add("hex_offsets", offsets.str(), "Offset of hex corners from "
"hex centers.");
std::ostringstream polygon;
polygon.setf(std::ios_base::fixed, std::ios_base::floatfield);
polygon.precision(m_precision);
m_grid->toWKT(polygon);
if (m_outputTesselation)
{
MetadataNode hexes = m_metadata.add("hexagons");
for (HexIter hi = m_grid->hexBegin(); hi != m_grid->hexEnd(); ++hi)
{
HexInfo h = *hi;
MetadataNode hex = hexes.addList("hexagon");
hex.add("density", h.density());
hex.add("gridpos", Utils::toString(h.xgrid()) + " " +
Utils::toString((h.ygrid())));
std::ostringstream oss;
// Using stream limits precision (default 6)
oss << "POINT (" << h.x() << " " << h.y() << ")";
hex.add("center", oss.str());
}
m_metadata.add("hex_boundary", polygon.str(),
"Boundary MULTIPOLYGON of domain");
}
/***
We want to make these bumps on edges go away, which means that
we want to elimnate both B and C. If we take a line from A -> C,
we need the tolerance to eliminate B. After that we're left with
the triangle ACD and we want to eliminate C. The perpendicular
distance from AD to C is the hexagon height / 2, so we set the
tolerance a little larger than that. This is larger than the
perpendicular distance needed to eliminate B in ABC, so should
serve for both cases.
B ______ C
/ \
A / \ D
***/
double tolerance = 1.1 * m_grid->height() / 2;
double cull = m_cullArg->set() ? m_cullArea : (6 * tolerance * tolerance);
SpatialReference srs(table.anySpatialReference());
pdal::Polygon p(polygon.str(), srs);
pdal::Polygon density_p(polygon.str(), srs);
// If the SRS was geographic, use relevant
// UTM for area and density computation
if (srs.isGeographic())
{
// Compute a UTM polygon
BOX3D box = p.bounds();
int zone = SpatialReference::calculateZone(box.minx, box.miny);
auto makezone = [] (int zone) -> std::string
{
std::ostringstream z;
// Use WGS84 UTM zones
z << "EPSG:327" << abs(zone);
return z.str();
};
SpatialReference utm(makezone(zone));
density_p = p.transform(utm);
}
if (m_doSmooth)
p = p.simplify(tolerance, cull);
std::string boundary_text = p.wkt(m_precision);
m_metadata.add("boundary", boundary_text,
"Approximated MULTIPOLYGON of domain");
m_metadata.addWithType("boundary_json", p.json(), "json",
"Approximated MULTIPOLYGON of domain");
double area = density_p.area();
double density = (double) m_count/ area ;
if (std::isinf(density))
{
density = -1.0;
area = -1.0;
}
m_metadata.add("density", density,
"Number of points per square unit (total area)");
m_metadata.add("area", area, "Area in square units of tessellated polygon");
double moving_avg(0.0);
double avg_count(0.0);
double hex_area(((3 * SQRT_3)/2.0) * (m_grid->height() * m_grid->height()));
int n(0);
point_count_t totalCount(0);
double totalArea(0.0);
for (HexIter hi = m_grid->hexBegin(); hi != m_grid->hexEnd(); ++hi)
{
HexInfo h = *hi;
totalCount += h.density();
totalArea += hex_area;
++n;
}
double avg_density = totalArea /(double) totalCount;
m_metadata.add("avg_pt_per_sq_unit", avg_density, "Number of points "
"per square unit (tessellated area within inclusions)");
double avg_spacing = std::sqrt(1/density);
m_metadata.add("avg_pt_spacing", avg_spacing,
"Avg point spacing (x/y units)");
}
void RdbReader::readMetadata(RdbPointcloud &reader, MetadataNode root)
{
struct Converter // simple JSON to MetadataNode converter
{
static void add(
MetadataNode& parent,
const std::string& name,
const std::string& value
)
{
Json::Value node;
Json::Reader reader;
if (reader.parse(value, node))
add(parent, name, node);
else parent.add(name, value);
}
static void add(
MetadataNode& parent,
const std::string& name,
const Json::Value& node
)
{
if (node.isNull()) { parent.add(name, ""); }
else if (node.isBool()) { parent.add(name, node.asBool()); }
else if (node.isInt()) { parent.add(name, node.asInt64()); }
else if (node.isUInt()) { parent.add(name, node.asUInt64()); }
else if (node.isDouble()) { parent.add(name, node.asDouble()); }
else if (node.isString()) { parent.add(name, node.asString()); }
else if (node.isObject())
{
MetadataNode object = parent.add(name);
for (const std::string& name: node.getMemberNames())
{
add(object, name, node[name]);
}
}
else if (node.isArray())
{
for (const Json::Value& item: node)
{
add(parent, name, item);
}
}
}
};
// get database object
using namespace riegl::rdb::pointcloud;
riegl::rdb::Pointcloud& rdb = reader.pointcloud();
// basic database information
{
QueryStat stat = rdb.stat();
GraphNode tree = stat.index();
// database ID and number of points
MetadataNode node = root.add("database");
node.add("uuid", rdb.getUUID());
node.add("points", tree.pointCountTotal);
// XYZ bounds (if available)
Eigen::Vector4d minimum, maximum;
if (reader.getBoundingBox(minimum, maximum))
{
MetadataNode bounds = node.add("bounds");
MetadataNode min = bounds.add("minimum");
MetadataNode max = bounds.add("maximum");
min.add("X", minimum[0]); max.add("X", maximum[0]);
min.add("Y", minimum[1]); max.add("Y", maximum[1]);
min.add("Z", minimum[2]); max.add("Z", maximum[2]);
}
}
// database transactions
{
const auto list = rdb.transaction().list();
for (const auto& item: list)
{
const auto details = rdb.transaction().details(item);
MetadataNode node = root.add("transactions");
node.add("id", details.id);
node.add("rdb", details.rdb);
node.add("title", details.title);
node.add("agent", details.agent);
node.add("comments", details.comments);
node.add("start", details.start);
node.add("stop", details.stop);
Converter::add(node, "settings", details.settings);
}
}
// point attributes
{
const auto list = rdb.pointAttribute().list();
for (const auto& item: list)
{
const auto details = rdb.pointAttribute().get(item);
Converter::add(root, "dimensions", details.save());
}
}
// meta data
{
MetadataNode node = root.add("metadata");
const auto list = rdb.metaData().list();
for (const auto& item: list)
{
const auto details = rdb.metaData().get(item);
Converter::add(node, item, details);
}
}
}
