Hahmann and Burghart estimate at least 60% of all information is geospatially referenced. Fortunately, Django includes a variety of spatial and mapping tools to help build spatially-aware services. This talk will give an overview of geospatial concepts for the Australian and Django communities.
From geo-tagged photos to the route between a user and their destination, at least 60% of all information generated is geospatially referenced (Hahmann and Burghart 2013). Therefore, being able to store, query and display spatial information in a Django can be a core function of a contemporary web application. Fortunately, GeoDjango is a Django core module that adds spatial capabilities to any Django website or service and this talk will provide an introduction to the world of Django and web mapping.
This talk will cover:
an introduction to fundamental geospatial concepts, highlighting key issues for Australian developers,
a tour of common, third-party geospatial services and technologies used in websites such as maps and satellite imagery, geocoding, routing and spatial databases,
an overview of storing and querying spatial data in a Django app,
front-end libraries you can use to display spatial data, and
related topics to continue your spatial journey including big data and streaming data.
It is envisioned that this talk will provide a solid foundation for experienced Django developers new to geospatial analysis and mapping to develop their own Django web services using the GeoDjango documentation and concepts covered in this talk: avoiding common pitfalls in building and localising geospatial data. It is also envisioned that this talk would allow geospatial analysts to convert their algorithms to Django-equivalent concepts. This talk will also give an overview of future technologies that may be of interest to advanced developers to investigate.
Big Spatial(!) Data Processing mit GeoMesa. AGIT 2019, Salzburg, Austria.Anita Graser
This talk introduces GeoMesa and discusses how it can be used to store and analyze massive amounts of movement data.
Talk recording: https://av.tib.eu/media/42874
My part of the slide deck from the Integrator Event for the DTC PhD students, 2 Dec 2009. This includes the additional slides I mentioned on the Modifiable Areal Unit Problem.
Big Spatial(!) Data Processing mit GeoMesa. AGIT 2019, Salzburg, Austria.Anita Graser
This talk introduces GeoMesa and discusses how it can be used to store and analyze massive amounts of movement data.
Talk recording: https://av.tib.eu/media/42874
My part of the slide deck from the Integrator Event for the DTC PhD students, 2 Dec 2009. This includes the additional slides I mentioned on the Modifiable Areal Unit Problem.
Recod @ MediaEval 2014: Diverse Social Images Retrievalmultimediaeval
This paper presents the results of the first participation of our multi-institutional team in the Retrieving Diverse Social Images Task at MediaEval 2014. In this task we were required to develop a summarization and diversification approach for social photo retrieval. Our approach is based on irrelevant image filtering, image re-ranking, and diversity promotion by clustering. We have used visual and textual features, including image metadata and user credibility information.
http://ceur-ws.org/Vol-1263/mediaeval2014_submission_38.pdf
Outlier detection is very interesting, useful and challenging problem in the field of data mining. Because of
sparse data clustering algorithm which are based on distance will not work to find outliers in spatial data.
Problem of finding irregular feature in spatial data need to be explore. Many existing approaches have
been proposed to overcome the problem of outlier detection in spatial Geographic data. In this paper an
efficient clustering and density based outlier detection framework has been proposed. The process of
outlier detection has been categorized into two steps in the first step data has been clustered together based
on any density based DBSCAN algorithm and in the second stage outlier detection is performed using LOF.
The purpose is to perform clustering and outlier mining simultaneously to improve feasibility of framework.
To verify the efficiency and robustness of proposed method, comparative study of proposed approach and
several existing approaches are presented in detail, various simulation results demonstrate the
effectiveness of the proposed approach.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Survey of indoor tracking systems using augmented realityIAESIJAI
Augmented reality overlays virtual content on the physical world, displaying location-based information more efficiently. Tracking is a trace detail of the location recorded, either by taking a reading based on a set time interval, set distance, and change in direction by more than a certain angle, or a combination of these. Tracking is divided into two types, outdoor tracking, and indoor tracking. Augmented reality added value and information to tracking applications, whether indoor or outdoor. Recently, outdoor tracking by the global positioning system (GPS) became an essential component in navigation applications. However, indoor tracking is still challenging in the augmented reality field. Most augmented reality indoor tracking use optical and sensor-based tracking, such as markers, beacons, Raspberry Pi, and
route planner modules for the building. With the technology enhancement, indoor tracking started to rely on Wi-Fi, Bluetooth, geographic information system, radiofrequency identification, and sensor chip technologies. Our paper describes the recent augmented reality tracking techniques from 2011 to 2021. The paper compares image detection algorithms with various communication technologies, disscusing the advantages and the limitations of each technology.
This presentation shows an overview of the main concepts introduced in the EDBT2015 Summer School, which took place in Palamos. For each area, we summarize the main issues and current approaches. We also describe the challenges and main activities that were undertaken in the summer school
The visibility estimation has an important impact in many economical and aesthetic fields, a mixed environment which contains madman objects like buildings with relief sol make a challenge for the visibility calculation. This paper presents a new method to solve this problem based on vector GIS data. The use of vector data gives the possibility to calculate the intervisibility, viewshed for mixed environment. The new method could identify the obstacles (relief, buildings identification) which block the visibility for a 3D environment points from observator, the intervisibility impact of a specific building could be calculated
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
Recod @ MediaEval 2014: Diverse Social Images Retrievalmultimediaeval
This paper presents the results of the first participation of our multi-institutional team in the Retrieving Diverse Social Images Task at MediaEval 2014. In this task we were required to develop a summarization and diversification approach for social photo retrieval. Our approach is based on irrelevant image filtering, image re-ranking, and diversity promotion by clustering. We have used visual and textual features, including image metadata and user credibility information.
http://ceur-ws.org/Vol-1263/mediaeval2014_submission_38.pdf
Outlier detection is very interesting, useful and challenging problem in the field of data mining. Because of
sparse data clustering algorithm which are based on distance will not work to find outliers in spatial data.
Problem of finding irregular feature in spatial data need to be explore. Many existing approaches have
been proposed to overcome the problem of outlier detection in spatial Geographic data. In this paper an
efficient clustering and density based outlier detection framework has been proposed. The process of
outlier detection has been categorized into two steps in the first step data has been clustered together based
on any density based DBSCAN algorithm and in the second stage outlier detection is performed using LOF.
The purpose is to perform clustering and outlier mining simultaneously to improve feasibility of framework.
To verify the efficiency and robustness of proposed method, comparative study of proposed approach and
several existing approaches are presented in detail, various simulation results demonstrate the
effectiveness of the proposed approach.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Survey of indoor tracking systems using augmented realityIAESIJAI
Augmented reality overlays virtual content on the physical world, displaying location-based information more efficiently. Tracking is a trace detail of the location recorded, either by taking a reading based on a set time interval, set distance, and change in direction by more than a certain angle, or a combination of these. Tracking is divided into two types, outdoor tracking, and indoor tracking. Augmented reality added value and information to tracking applications, whether indoor or outdoor. Recently, outdoor tracking by the global positioning system (GPS) became an essential component in navigation applications. However, indoor tracking is still challenging in the augmented reality field. Most augmented reality indoor tracking use optical and sensor-based tracking, such as markers, beacons, Raspberry Pi, and
route planner modules for the building. With the technology enhancement, indoor tracking started to rely on Wi-Fi, Bluetooth, geographic information system, radiofrequency identification, and sensor chip technologies. Our paper describes the recent augmented reality tracking techniques from 2011 to 2021. The paper compares image detection algorithms with various communication technologies, disscusing the advantages and the limitations of each technology.
This presentation shows an overview of the main concepts introduced in the EDBT2015 Summer School, which took place in Palamos. For each area, we summarize the main issues and current approaches. We also describe the challenges and main activities that were undertaken in the summer school
The visibility estimation has an important impact in many economical and aesthetic fields, a mixed environment which contains madman objects like buildings with relief sol make a challenge for the visibility calculation. This paper presents a new method to solve this problem based on vector GIS data. The use of vector data gives the possibility to calculate the intervisibility, viewshed for mixed environment. The new method could identify the obstacles (relief, buildings identification) which block the visibility for a 3D environment points from observator, the intervisibility impact of a specific building could be calculated
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
Dev Dives: Train smarter, not harder – active learning and UiPath LLMs for do...UiPathCommunity
💥 Speed, accuracy, and scaling – discover the superpowers of GenAI in action with UiPath Document Understanding and Communications Mining™:
See how to accelerate model training and optimize model performance with active learning
Learn about the latest enhancements to out-of-the-box document processing – with little to no training required
Get an exclusive demo of the new family of UiPath LLMs – GenAI models specialized for processing different types of documents and messages
This is a hands-on session specifically designed for automation developers and AI enthusiasts seeking to enhance their knowledge in leveraging the latest intelligent document processing capabilities offered by UiPath.
Speakers:
👨🏫 Andras Palfi, Senior Product Manager, UiPath
👩🏫 Lenka Dulovicova, Product Program Manager, UiPath
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
Enhancing Performance with Globus and the Science DMZGlobus
ESnet has led the way in helping national facilities—and many other institutions in the research community—configure Science DMZs and troubleshoot network issues to maximize data transfer performance. In this talk we will present a summary of approaches and tips for getting the most out of your network infrastructure using Globus Connect Server.
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
Why You Should Replace Windows 11 with Nitrux Linux 3.5.0 for enhanced perfor...SOFTTECHHUB
The choice of an operating system plays a pivotal role in shaping our computing experience. For decades, Microsoft's Windows has dominated the market, offering a familiar and widely adopted platform for personal and professional use. However, as technological advancements continue to push the boundaries of innovation, alternative operating systems have emerged, challenging the status quo and offering users a fresh perspective on computing.
One such alternative that has garnered significant attention and acclaim is Nitrux Linux 3.5.0, a sleek, powerful, and user-friendly Linux distribution that promises to redefine the way we interact with our devices. With its focus on performance, security, and customization, Nitrux Linux presents a compelling case for those seeking to break free from the constraints of proprietary software and embrace the freedom and flexibility of open-source computing.
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
Climate Impact of Software Testing at Nordic Testing DaysKari Kakkonen
My slides at Nordic Testing Days 6.6.2024
Climate impact / sustainability of software testing discussed on the talk. ICT and testing must carry their part of global responsibility to help with the climat warming. We can minimize the carbon footprint but we can also have a carbon handprint, a positive impact on the climate. Quality characteristics can be added with sustainability, and then measured continuously. Test environments can be used less, and in smaller scale and on demand. Test techniques can be used in optimizing or minimizing number of tests. Test automation can be used to speed up testing.
Removing Uninteresting Bytes in Software FuzzingAftab Hussain
Imagine a world where software fuzzing, the process of mutating bytes in test seeds to uncover hidden and erroneous program behaviors, becomes faster and more effective. A lot depends on the initial seeds, which can significantly dictate the trajectory of a fuzzing campaign, particularly in terms of how long it takes to uncover interesting behaviour in your code. We introduce DIAR, a technique designed to speedup fuzzing campaigns by pinpointing and eliminating those uninteresting bytes in the seeds. Picture this: instead of wasting valuable resources on meaningless mutations in large, bloated seeds, DIAR removes the unnecessary bytes, streamlining the entire process.
In this work, we equipped AFL, a popular fuzzer, with DIAR and examined two critical Linux libraries -- Libxml's xmllint, a tool for parsing xml documents, and Binutil's readelf, an essential debugging and security analysis command-line tool used to display detailed information about ELF (Executable and Linkable Format). Our preliminary results show that AFL+DIAR does not only discover new paths more quickly but also achieves higher coverage overall. This work thus showcases how starting with lean and optimized seeds can lead to faster, more comprehensive fuzzing campaigns -- and DIAR helps you find such seeds.
- These are slides of the talk given at IEEE International Conference on Software Testing Verification and Validation Workshop, ICSTW 2022.
Welcome to the first live UiPath Community Day Dubai! Join us for this unique occasion to meet our local and global UiPath Community and leaders. You will get a full view of the MEA region's automation landscape and the AI Powered automation technology capabilities of UiPath. Also, hosted by our local partners Marc Ellis, you will enjoy a half-day packed with industry insights and automation peers networking.
📕 Curious on our agenda? Wait no more!
10:00 Welcome note - UiPath Community in Dubai
Lovely Sinha, UiPath Community Chapter Leader, UiPath MVPx3, Hyper-automation Consultant, First Abu Dhabi Bank
10:20 A UiPath cross-region MEA overview
Ashraf El Zarka, VP and Managing Director MEA, UiPath
10:35: Customer Success Journey
Deepthi Deepak, Head of Intelligent Automation CoE, First Abu Dhabi Bank
11:15 The UiPath approach to GenAI with our three principles: improve accuracy, supercharge productivity, and automate more
Boris Krumrey, Global VP, Automation Innovation, UiPath
12:15 To discover how Marc Ellis leverages tech-driven solutions in recruitment and managed services.
Brendan Lingam, Director of Sales and Business Development, Marc Ellis
A travellers guide to mapping technologies in django
1. A TRAVELLER'S
GUIDE TO MAPPING
TECHNOLOGIES IN
DJANGO
Anthony I. Joseph
DjangoConAU 2018
24 August 2018
anthony.djangoconau@fastmail.com
linkedin.com/in/anthony-joseph/
This work is licensed under a Creative Commons
Attribution-NonCommercial-NoDerivs 3.0
Australia License.
5. THE BASICS
Sydney Opera House
Latitude: -33.8566
Longitude: 151.21507
But what is a co-ordinate?
6. A GEOGRAPHIC COORDINATE SYSTEM
3D Spherical Surface
Latitude/Longitude
Angles from a
centre point
WGS84
World Geodetic
System
SRID: 4362
7. GEOGRAPHIC COORDINATE SYSTEMS
Advantages
No distortions
Represent any point
Disadvantages
Complicated distance/area
calculations
Display 3D point in 2D media?
Image source: https://desktop.arcgis.com/en/arcmap/10.3/guide-
books/map-projections/about-geographic-coordinate-systems.htm
8. PROJECTED COORDINATE SYSTEMS
Examples:
Web Mercator
GDA94
Geocentric Datum of
Australia 1994
Advantages:
Great for display
Great for analysis*
Disadvantages:
Distorted
area/distance/shape
Image source: https://www.xkcd.com/977/
9. COMMON DATA FORMATS
Vector Raster
Image Sources:
- https://twitter.com/PSMA/status/1031799625831854080/photo/1
- http://www.ga.gov.au/scientific-topics/national-location-information
/digital-elevation-data
20. GIS DATA SOURCES
Web services:
Web Map Service (WMS)
Web Coverage Services
(WCS)
Open Geospatial Consortium
File formats:
Well-known text (WKT)
Keyhole Markup (KML)
GeoJSON
ESRI ArcGIS Shapefiles
MapInfo TAB files
21. DATABASE ENGINES
GIS extensions to database systems
OpenGIS® Implementation Standard for Geographic
information
PostgreSQL + GIS = PostGIS
SQLite + GIS = Spatialite
…MySQL/MSSQL/OracleDB
…MongoDB
23. DATABASE FIELDS
DATA TYPE FIELD TYPE
Points PointField/MultiPointField
Lines LineStringField/
MultiLineStringField
Polygons PolygonField/MultiPolygonField
Source:
https://docs.djangoproject.com/en/2.0/ref/contrib/gis/model-api
25. SPATIAL REFERENCE SYSTEMS
Data often in WGS84
May get data in other
reference systems
Convert between systems:
Reproject – ogr2ogr
Check the metadata!
29. QUERYSETS: POINT IN POLYGON
Example model Example query
class Suburb(models.Model):
postcode = models.CharField()
boundary = models.PolygonField()
pnt = GEOSGeometry('POINT(151.178 -33.884)’,
srid=4326)
qs = Suburb.objects.filter(
boundary__contains=pnt)
30. QUERYSETS: WITHIN DISTANCE (2KM)
Example model Example query
class Store(models.Model):
name = models.CharField()
location = models.PointField()
from django.contrib.gis.measure import
D
pnt = GEOSGeometry('POINT(151.196 -33.870)’,
srid=4326)
qs = Store.objects.filter(
location__dwithin=(pnt, D(m=2000)))
)
31. QUERYSETS: SORT BY DISTANCE
Example model Example query
class Store(models.Model):
name = models.CharField()
location = models.PointField()
from django.contrib.gis.db.models.functions
import Distance
usr = GEOSGeometry('POINT(151.178 -33.884)’,
srid=4326)
qs = Store.objects.annotate(
distance=Distance(‘location',listing.point)
).order_by('distance')
1
2
3
39. SIMPLE EXAMPLE
Web maps automatically
reproject:
>from WGS84
(geographical coordinate
system),
>to Web Mercator
(projected coordinate
system)
40. FORMS API
DATA TYPE FIELD TYPE
Points PointField/MultiPointField
Lines LineStringField/
MultiLineStringField
Polygons PolygonField/MultiPolygonField
Source:
https://docs.djangoproject.com/en/2.1/ref/contrib/gis/forms-api/
44. NEW AUSTRALIAN DATUM
Currently use GDA94 (EPSG
4939)
Geosciences Australian
developing GDA2020 (EPSG
7844)
Affects Australian government
data
May need to reproject data
Image source: http://www.ga.gov.au/scientific-
topics/positioning-navigation/datum-
modernisation
45. KEY TAKEAWAY
POINTS
The official docs are great:
don’t forget to use them!
Make use of existing
libraries/3rd party services:
“don’t roll your own crypto”!
Be careful of:
• coordinate systems
• licences
• coverage
Geospatial analysis is a lot
like statistics: easy to do
something that looks
correct, but has underlying
issues. Question assumptions and
check metadata