Pyqgis Developer Cookbook Release 2.14
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Interfacing Gaudi with Python Objectives
8 Interfacing Gaudi with Python Gaudi Framework Tutorial, 2004 Objectives After completing this lesson, you should be able to: • Understand how Gaudi is interfaced to Python • Convince you that Python is a very good programming language for Rapid Prototyping • Write simple Python scripts to access LHCb data 8-2 Gaudi Framework Tutorial, 2004 Python Language Python is an Open Source programming language created by Guido van Rossum. While it has been available since 1990, it has recently seen a dramatic increase in popularity in a wide variety of domains Python is simple, elegant, powerful and reliable Features: • Variables & Arithmetic expressions • String manipulations • Conditionals (if/else statements), Loops (for/while) • Functions, Lists, Dictionaries, Classes (Objects), Exceptions , Modules 8-3 Gaudi Framework Tutorial, 2004 Why Python? Free, Open-Source, Maintainable Cross-Platform, Portable General-Purpose, High-level, Object-Oriented Interpreted • However it is quite fast (byte code idea from Java) Dynamically typed, Introspective • Not need to declare any variable Simple syntax, Robust • Emphasis by the author to minimize typing Variety of Shells Powerful built-in types and modules Î Ideal for Scripting and Prototyping 8-4 Gaudi Framework Tutorial, 2004 Python as a “Glue” Extension Modules • Very easy to interface to C++ classes (C-API) Collaborative • Extension modules can be plugged and used together Very rich set LHC modules specialized generic modules Several GUI toolkits EDG API PVSS XML Database GUIGUI Python shell JPE PyROOT gaudipython mathmath Gateways to other frameworks Java Root Gaudi Very rich set Classes Classes Framework of Python standard 8-5 Gaudi Framework Tutorial, 2004 modules Python Binding Techniques Python provides a very complete C-API • By hand bindings are possible but even for medium-sized projects, it becomes cumbersome and unmaintainable. -
Pyqgis Developer Cookbook Release 2.18
PyQGIS developer cookbook Release 2.18 QGIS Project April 08, 2019 Contents 1 Introduction 1 1.1 Run Python code when QGIS starts.................................1 1.2 Python Console............................................2 1.3 Python Plugins............................................3 1.4 Python Applications.........................................3 2 Loading Projects 7 3 Loading Layers 9 3.1 Vector Layers.............................................9 3.2 Raster Layers............................................. 11 3.3 Map Layer Registry......................................... 11 4 Using Raster Layers 13 4.1 Layer Details............................................. 13 4.2 Renderer............................................... 13 4.3 Refreshing Layers.......................................... 15 4.4 Query Values............................................. 15 5 Using Vector Layers 17 5.1 Retrieving information about attributes............................... 17 5.2 Selecting features........................................... 18 5.3 Iterating over Vector Layer...................................... 18 5.4 Modifying Vector Layers....................................... 20 5.5 Modifying Vector Layers with an Editing Buffer.......................... 22 5.6 Using Spatial Index......................................... 23 5.7 Writing Vector Layers........................................ 23 5.8 Memory Provider........................................... 24 5.9 Appearance (Symbology) of Vector Layers............................. 26 5.10 Further -
Pyqgis Testing Developer Cookbook
PyQGIS testing developer cookbook QGIS Project Sep 25, 2021 CONTENTS 1 Introduction 1 1.1 Scripting in the Python Console ................................... 1 1.2 Python Plugins ............................................ 2 1.2.1 Processing Plugins ...................................... 3 1.3 Running Python code when QGIS starts ............................... 3 1.3.1 The startup.py file ................................... 3 1.3.2 The PYQGIS_STARTUP environment variable ...................... 3 1.4 Python Applications ......................................... 3 1.4.1 Using PyQGIS in standalone scripts ............................. 4 1.4.2 Using PyQGIS in custom applications ............................ 5 1.4.3 Running Custom Applications ................................ 5 1.5 Technical notes on PyQt and SIP ................................... 6 2 Loading Projects 7 2.1 Resolving bad paths .......................................... 8 3 Loading Layers 9 3.1 Vector Layers ............................................. 9 3.2 Raster Layers ............................................. 12 3.3 QgsProject instance .......................................... 14 4 Accessing the Table Of Contents (TOC) 15 4.1 The QgsProject class ......................................... 15 4.2 QgsLayerTreeGroup class ...................................... 16 5 Using Raster Layers 19 5.1 Layer Details ............................................. 19 5.2 Renderer ............................................... 20 5.2.1 Single Band Rasters .................................... -
Assessmentof Open Source GIS Software for Water Resources
Assessment of Open Source GIS Software for Water Resources Management in Developing Countries Daoyi Chen, Department of Engineering, University of Liverpool César Carmona-Moreno, EU Joint Research Centre Andrea Leone, Department of Engineering, University of Liverpool Shahriar Shams, Department of Engineering, University of Liverpool EUR 23705 EN - 2008 The mission of the Institute for Environment and Sustainability is to provide scientific-technical support to the European Union’s Policies for the protection and sustainable development of the European and global environment. European Commission Joint Research Centre Institute for Environment and Sustainability Contact information Cesar Carmona-Moreno Address: via fermi, T440, I-21027 ISPRA (VA) ITALY E-mail: [email protected] Tel.: +39 0332 78 9654 Fax: +39 0332 78 9073 http://ies.jrc.ec.europa.eu/ http://www.jrc.ec.europa.eu/ Legal Notice Neither the European Commission nor any person acting on behalf of the Commission is responsible for the use which might be made of this publication. Europe Direct is a service to help you find answers to your questions about the European Union Freephone number (*): 00 800 6 7 8 9 10 11 (*) Certain mobile telephone operators do not allow access to 00 800 numbers or these calls may be billed. A great deal of additional information on the European Union is available on the Internet. It can be accessed through the Europa server http://europa.eu/ JRC [49291] EUR 23705 EN ISBN 978-92-79-11229-4 ISSN 1018-5593 DOI 10.2788/71249 Luxembourg: Office for Official Publications of the European Communities © European Communities, 2008 Reproduction is authorised provided the source is acknowledged Printed in Italy Table of Content Introduction............................................................................................................................4 1. -
QGIS Server 3.16 User Guide
QGIS Server 3.16 User Guide QGIS Project Sep 29, 2021 CONTENTS 1 Introduction 1 2 Getting Started 3 2.1 Installation on Debian-based systems ................................. 3 2.1.1 Apache HTTP Server .................................... 4 2.1.2 NGINX HTTP Server .................................... 6 2.1.3 Xvfb ............................................. 10 2.2 Installation on Windows ....................................... 11 2.3 Serve a project ............................................ 14 2.4 Configure your project ........................................ 15 2.4.1 WMS capabilities ...................................... 16 2.4.2 WFS capabilities ...................................... 17 2.4.3 WCS capabilities ...................................... 17 2.4.4 Fine tuning your OWS ................................... 17 2.5 Integration with third parties ..................................... 17 2.5.1 Integration with QGIS Desktop ............................... 17 2.5.2 Integration with MapProxy ................................. 17 2.5.3 Integration with QWC2 ................................... 18 3 Services 19 3.1 Web Map Service (WMS) ...................................... 19 3.1.1 GetMap ........................................... 20 3.1.2 GetFeatureInfo ....................................... 27 3.1.3 GetPrint ........................................... 30 3.1.4 GetLegendGraphics ..................................... 32 3.1.5 GetProjectSettings ...................................... 33 3.2 Web Feature Service (WFS) .................................... -
Introduction to QGIS: Download and Install
Introduction to QGIS: Download and Install University of Colorado Denver Facility for Advanced Spatial Technology [email protected] Annotations Computer Science Crash Cource What is QGIS? Download QGIS is a free and open source Geographic Information System. This To get started with QGIS you will need to download the software means that a user has the ability to create, export and design maps, which matches your system. You will most likely be choosing much in the same way you would using and ArcMap. The upside, as between Windows or Mac, and you will also need to know compared with ESRI products, is that QGIS is free for anyone to whether your system is 64bit ot 32bit. download and use. QGIS can run on Linux, Unix, Mac OSX, Windows and even Android. To follow along with the instructions visit: https://www.qgis.org Why use QGIS? The mian reason someone would want to use QGIS is the fact that it is free and open source. Again, this means that anyone can use it free of charge, and on many different systems. What do I need to get started? This document will show the steps necessary for getting started with QGIS. For basic cartography and map design, almost any computer from the last ten years can run QGIS, which is a large upside compared with beefier programs like ArcMap and ArcPro. That being said a minimum of two cores is highly recommended, as well as about 5GB of free space on your hard drive for the program and files. 2 • facility for advanced spatial technology Annotations Computer Science Crash Cource Step One: Once you have navigated to the QGIS homepage, select the green “Download Now” button. -
IT Acronyms.Docx
List of computing and IT abbreviations /.—Slashdot 1GL—First-Generation Programming Language 1NF—First Normal Form 10B2—10BASE-2 10B5—10BASE-5 10B-F—10BASE-F 10B-FB—10BASE-FB 10B-FL—10BASE-FL 10B-FP—10BASE-FP 10B-T—10BASE-T 100B-FX—100BASE-FX 100B-T—100BASE-T 100B-TX—100BASE-TX 100BVG—100BASE-VG 286—Intel 80286 processor 2B1Q—2 Binary 1 Quaternary 2GL—Second-Generation Programming Language 2NF—Second Normal Form 3GL—Third-Generation Programming Language 3NF—Third Normal Form 386—Intel 80386 processor 1 486—Intel 80486 processor 4B5BLF—4 Byte 5 Byte Local Fiber 4GL—Fourth-Generation Programming Language 4NF—Fourth Normal Form 5GL—Fifth-Generation Programming Language 5NF—Fifth Normal Form 6NF—Sixth Normal Form 8B10BLF—8 Byte 10 Byte Local Fiber A AAT—Average Access Time AA—Anti-Aliasing AAA—Authentication Authorization, Accounting AABB—Axis Aligned Bounding Box AAC—Advanced Audio Coding AAL—ATM Adaptation Layer AALC—ATM Adaptation Layer Connection AARP—AppleTalk Address Resolution Protocol ABCL—Actor-Based Concurrent Language ABI—Application Binary Interface ABM—Asynchronous Balanced Mode ABR—Area Border Router ABR—Auto Baud-Rate detection ABR—Available Bitrate 2 ABR—Average Bitrate AC—Acoustic Coupler AC—Alternating Current ACD—Automatic Call Distributor ACE—Advanced Computing Environment ACF NCP—Advanced Communications Function—Network Control Program ACID—Atomicity Consistency Isolation Durability ACK—ACKnowledgement ACK—Amsterdam Compiler Kit ACL—Access Control List ACL—Active Current -
The State of Open Source GIS
The State of Open Source GIS Prepared By: Paul Ramsey, Director Refractions Research Inc. Suite 300 – 1207 Douglas Street Victoria, BC, V8W-2E7 [email protected] Phone: (250) 383-3022 Fax: (250) 383-2140 Last Revised: September 15, 2007 TABLE OF CONTENTS 1 SUMMARY ...................................................................................................4 1.1 OPEN SOURCE ........................................................................................... 4 1.2 OPEN SOURCE GIS.................................................................................... 6 2 IMPLEMENTATION LANGUAGES ........................................................7 2.1 SURVEY OF ‘C’ PROJECTS ......................................................................... 8 2.1.1 Shared Libraries ............................................................................... 9 2.1.1.1 GDAL/OGR ...................................................................................9 2.1.1.2 Proj4 .............................................................................................11 2.1.1.3 GEOS ...........................................................................................13 2.1.1.4 Mapnik .........................................................................................14 2.1.1.5 FDO..............................................................................................15 2.1.2 Applications .................................................................................... 16 2.1.2.1 MapGuide Open Source...............................................................16 -
Qgis-1.0.0-User-Guide-En.Pdf
Quantum GIS User, Installation and Coding Guide Version 1.0.0 ’Kore’ Preamble This document is the original user, installation and coding guide of the described software Quantum GIS. The software and hardware described in this document are in most cases registered trademarks and are therefore subject to the legal requirements. Quantum GIS is subject to the GNU General Public License. Find more information on the Quantum GIS Homepage http://qgis.osgeo.org. The details, data, results etc. in this document have been written and verified to the best of knowledge and responsibility of the authors and editors. Nevertheless, mistakes concerning the content are possible. Therefore, all data are not liable to any duties or guarantees. The authors, editors and publishers do not take any responsibility or liability for failures and their consequences. Your are always welcome to indicate possible mistakes. This document has been typeset with LATEX. It is available as LATEX source code via subversion and online as PDF document via http://qgis.osgeo.org/documentation/manuals.html. Translated versions of this document can be downloaded via the documentation area of the QGIS project as well. For more information about contributing to this document and about translating it, please visit: http://wiki.qgis.org/qgiswiki/DocumentationWritersCorner Links in this Document This document contains internal and external links. Clicking on an internal link moves within the document, while clicking on an external link opens an internet address. In PDF form, internal links are shown in blue, while external links are shown in red and are handled by the system browser. -
From GDAL to SAGA: Tips & Tricks from the World of Open Source
From GDAL to SAGA: Tips & Tricks from the World of Open Source Trevor Hobbs Resource Information Manager Huron-Manistee National Forests From GDAL to SAGA: Tips & Tricks from the World of Open Source Trevor Hobbs Resource Information Manager Director of Location Intelligence Huron-Manistee National Forests Purpose of this Presentation • Provide a brief introduction to a variety of open source GIS software • Serve as a reference to links and documentation • DEMO– LiDAR data processing using Open Source GIS • Relate open source GIS workflows to ESRI workflows • Promote greater awareness of open source GIS at IMAGIN Application Soft Launch – Michigan Forest Viewer, LiDAR Derivative Products served as WMTS layers through Amazon Web Services What is “Open Source” GIS? From the Open Source Geospatial Foundation… Technical • Open Source: a collaborative approach to Geospatial software development Documentation Release • Open Data: freely available information to use as you wish Collaborative Sustainable • Open Standards: avoid lock-in with interoperable Open Source Participatory software Social Open Developers Fair • Open Education: Removing the barriers to Community Guide learning and teaching Open Source Geospatial Foundation https://www.osgeo.org/ My Journey to Open Source… • Think geo-centric solutions, not software-centric solutions • International community of geospatial professionals from all backgrounds • Transparency builds trust Where do I get the Software? OSGeo Installation… • Link to download… https://qgis.org/en/site/forusers/download.html -
Building and Installing QGIS
Building and Installing QGIS Gary Sherman Tim Sutton September 1, 2005 Contents 1 Introduction 1 1.1 Installing Windows Version ..................................... 2 1.2 Installing Mac OS X Version .................................... 2 1.3 Building from Source ......................................... 2 2 Getting QGIS 3 3 PostgreSQL 3 4 GEOS 4 5 PostGIS 5 6 GRASS 5 7 Proj4 6 8 SQLite 6 9 GDAL/OGR 6 10 Qt 7 11 Building QGIS 8 11.1 Quick and Dirty ........................................... 8 11.2 Configuring QGIS the Right Way .................................. 8 11.2.1 Qt ............................................... 9 11.2.2 GDAL ............................................. 9 11.2.3 PostgreSQL .......................................... 9 11.2.4 GRASS ............................................ 9 11.2.5 Example Use of Configure .................................. 9 11.2.6 Compiling and Installing QGIS ............................... 10 12 Building Plugins 10 1 Introduction The majority of this document is devoted to describing how to build QGIS 0.7 (‘Seamus’) from the source distribution. These instructions are for Linux/Unix and other POSIX systems which have the required build environment. If you are building on FreeBSD, see http://community.qgis.org/buildingOnFreeBSD.html for hints and further information. Installing on Windows and Mac OS X is a simple process as described below. 1 Building QGIS 0.7 1 INTRODUCTION You don’t have to build all the QGIS dependencies from source. If your platform provides packages at an acceptable version for the needed dependencies, you can install them prior to building QGIS. Make sure you also install the ”development” package (if separate from the main package) for each dependency. QGIS needs the header files from these packages in order to build. -
QGIS) Software
IJCSN International Journal of Computer Science and Network, Volume 4, Issue 3, June 2015 ISSN (Online) : 2277-5420 www.IJCSN.org Impact Factor: 0.417 513 Importance of Linux for Open-Source Quantum Geographic Information Systems (QGIS) Software 1 Pratik P. Bheley, 2 Voore Subba Rao 1 Asst. Professor, Dept. of Electronics Engineering, RGCER, Nagpur 2 Sr. Executive Engineer, Systems Admin Dept. ADCC Info CAD Ltd., IT Park, Near VNIT, Nagpur Abstract - The successful examples of systems software 1. Introduction such as Linux has been substantial interest by policy makers and researchers on the dynamics of the production of open- A Geographic Information System (GIS) represent a source software. A topic of particular interest is the systematic integration of computer hardware, software, adoption of open-source software systems in developing nations, as a means of reducing licensing costs and of data and procedures designed to support the data capture, promoting indigenous technological development by having storage, management, updating, manipulation, analysis, access to the source code of these systems. The importance of and display of spatial data. More simply, a GIS is a rapid development and research work of open-source system that provides the ability to work with information software for QGIS software is taking essential for open that is referenced to the surface of the earth. source systems software like Linux. The excellent research work for software development for QGIS is a software for 2. Geographic Information System (GIS) online working software for GIS. A Geographic Information System (GIS) represent a systematic integration of computer hardware, software, data and procedures designed to This often involves the use of a geographic coordinate, support the data capture, storage, management, updating, like a latitude or longitude value.