tomkralidis

GDAL NetCDF Issues

GDAL has some limitation concerning the reading of netCDF4 files.

Most of the tests were done on a personal computer using QGIS 2.12.1 and GDAL 1.11.3.

• Gdal can't read correctly netCDF lat/long values if there is not an exact spacing between points (pixel). For example: use a exact spacing of 0.2 degrees.
• Gdal reads misplaced lat/long grid in netCDF4 files. It reads 0 to 360 degrees instead of -180 to 180 degrees. But I think that this can be solved setting a parameter (pm=-180 or pm=180) in projection definition in QGIS or MapServer.
• Gdal displays netCDF files upside down: http://lagerratrobe.blogspot.ca/2009/02/upside-down-netcdf-created-with-gdal.html
• Gdal can't detect if data are wrtitten bottom up or bottom down, so when reading netCDF files, to get statistics and pixel values we must change a configuration of Gdal.

tomkralidis

QGIS Metadata Strategy

• Date 2015/11/17
• Author Tom Kralidis
• Contact tomkralidis at gmail dot com
• Last Edited 2015/11/17
• Status Draft
• Version QGIS 3.x

Overview

tomkralidis

INSPIRE Metadata Validation Service Python wrapper

Code now moved to GitHub repository at https://github.com/tomkralidis/pyspire-metaval

tomkralidis

MapServer WFS Filter Issue

Thread: http://osgeo-org.1560.x6.nabble.com/WFS-1-1-0-filter-behaviour-issues-td5211672.html

Environment

• MapServer: 6.4.1 via UbuntuGIS

The issue occurs on a LAYER with PostGIS connection against point data.

LAYER.DATA snippet:

tomkralidis

CITE CSW helper script

• automates building of CSW 3.0.0, CSW 2.0.2 and teamengine packages
• set the MAVEN variable accordingly in build-cite-csw.sh

tomkralidis

OGC CSW 3.0.0 specification change request items

1. fix typo in examples (2015-05-11)

sed 's/FedeartedCatalogues/FederatedCatalogues/g' http://pvretano.com/schemas/csw/3.0/examples/Capabilities.xml
sed 's/FedeartedCatalogues/FederatedCatalogues/g' http://test.schemas.opengis.net/csw/3.0/examples/Capabilities.xml

1. pre 2.9 versions of libxml2 (or dervied bindings) fail to validate XML Schemas. Options:

• hotfix XML schemas like in examples https://github.com/GSA/ckanext-spatial/commit/1dc40bced82b77115e0d9da323a84ce1ef8d1dfe and https://github.com/geopython/pycsw/commit/7ab7a4051afa7acf0875fc51852a6141715aed56

tomkralidis

import sys
from owslib.csw import CatalogueServiceWeb

if len(sys.argv) < 3:
    print 'Usage: %s <csw-endpoint> <max-records>'
    sys.exit(1)

URL = sys.argv[1]
MAXRECORDS = sys.argv[2] or 10

tomkralidis

# -*- coding: utf-8 -*-
# =================================================================
#
# Authors: Tom Kralidis <tomkralidis@gmail.com>
#
# Copyright (c) 2016 Tom Kralidis
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation
# files (the "Software"), to deal in the Software without

tomkralidis

Copy https://github.com/geopython/pycsw/blob/master/pycsw/repository.py to https://github.com/geopython/pycsw/blob/master/pycsw/plugins/repository/metador2/metador2.py and edit the insert/update/delete functions accordingly.

tomkralidis

<?xml version="1.0" encoding="UTF-8"?>
<Harvest xmlns="http://www.opengis.net/cat/csw/2.0.2" xmlns:ogc="http://www.opengis.net/ogc" xmlns:gml="http://www.opengis.net/gml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengis.net/cat/csw/2.0.2 http://schemas.opengis.net/csw/2.0.2/CSW-publication.xsd" service="CSW" version="2.0.2">
 <Source>http://demo.pycsw.org/cite/csw</Source>
 <ResourceType>http://www.opengis.net/cat/csw/2.0.2</ResourceType>
 <ResourceFormat>application/xml</ResourceFormat>
 <Constraint version="1.1.0">
  <ogc:Filter>
   <ogc:BBOX>
    <ogc:PropertyName>ows:BoundingBox</ogc:PropertyName>
    <gml:Envelope>