Category Archives: QGIS

QGIS 3 Released!


On February 23rd QGIS 3 was formally released. Since then the developers have been working on completing installers for Windows, Mac and Linux. As of yesterday the software is ready to be installed on every operating system! To install it you can visit the QGIS Download page.

QGIS VERSIONS
QGIS always has two main versions available. There is the long-term release, which is the most stable because it is supported for one calendar year. In addition there is always a latest release. QGIS 3 falls into this latter category, it is the latest release. At the moment the long-term release is version 2.18. The latest release is still considered stable, but a new one comes out every 4 months.

WHICH VERSION TO CHOOSE?
If you want to have one version of QGIS without having to worry about updates, use the long-term release (2.18). If you want to experience all the new features that come with version 3 you will want the latest release (3.0). As mentioned last month, version 3 is a major new release with a lot of changes and new features.

On Windows machines you can have both. You can easily install both versions of QGIS side by side with no conflicts by using the OSGeo4W Network Installer. On Mac and Linux machines you can only have one version, so you need to choose.

QGIS 3
QGIS 3 is fast, stable and feature rich. The main issue for many users is that not all Plugins have yet  to be ported to QGIS 3. This is because this responsibility falls onto the individual plugin authors. With that said, at last count there were already 117 plugins available for version 3.

 

QGIS 3.0 To Be Released in February!

It’s an exciting month for QGIS. On February 23rd there will be a major new release of QGIS: QGIS 3.0. We haven’t had a major new release since 2013 when 2.0 came out. The development team has been working on this for a solid year. This version will be faster and have a lot of new features. Kurt Menke has been closely following the development of QGIS3. Over the last few months he has been experimenting with the pre-release version (v2.99). This post will cover some of the highlights that will be useful to Community Health Mappers. In general QGIS is going to be faster, more powerful and more efficient to work with. First off QGIS 3.0 comes with a new logo!qgis-logo_anita02

Overall the look of QGIS is very similar.  There are  the Layers and Browser panels to the left, a Map Canvas and lots of buttons and menus above. However, upon closer inspection there are a lot of very useful changes. For example, instead of there being a row of add data buttons down the left side, there is now a Unified Data Source Manager button which opens up a browser.

QGIS3red.jpg

The Unified Data Source Manager can be used to access the myriad of data formats QGIS supports and add them to QGIS. This includes vector, raster, database, web services etc. You can even browse within Esri File Geodatabases. Any GIS layer you are interested in, can then be added to QGIS by dragging and dropping it onto the map. DataSourceManager.gif

 

The Processing toolbox was completely redesigned and many tools were rewritten. This means many are now faster, more flexible and stable. There are also many new tools that didn’t exist in QGIS v2.x. Additionally processing tasks also now run in the background. This means  you don’t have to stop working while a tool runs! Yet another new processing feature is that layers in different projections will automatically be reprojected, so there is no need to reproject beforehand.

ProcessingToolbox.gif

 

Map Labels: It now much easier to edit labels. Previously you had to set up attribute columns and set those as data defined overrides. If you don’t know what all that means, it’s OK. Now all you have to do is simply put the layer into edit mode and edit labels with tools on the Label toolbar. Maps also now redraw more quickly due to cached label renderers.

labels.gif

 

There is now a Search bar in the lower left corner that can be used to search for map layers, features and processing tools. This makes finding things in QGIS quick and easy.

SearchBar.gif

 

The QGIS print composer was completely redesigned. They are now referred to as Layouts. Map insets can now be in a different map projection than the main map. There is a new and improved system of guides which include settings in any unit of measurement you could want (mm, cm, m, in, ft, pt, pica, pix). There are new controls for choosing fonts which include recently used fonts. When you export a map, a link to the folder shows up making it easy to track down the exported map.2018-01-31_163437.jpg

 

Other notable enhancements include:

  • A fully integrated 3D environment
  • Editing improvements including: a) widgets for layer attributes, b) CAD style digitizing tools that allow you to create perfect rectangles, circles, ellipses etc. and c) a new node editing tool with a lot of behavior improvements
  • Previews of where each map projection can be used. This will be a big help for beginners!2018-01-31_170602.jpg
  • User profiles that allow you to set up QGIS with different panels, plugins and toolbars for different projects or uses.
  • Improved hidpi/retina support

 

Where do you go from here?

  • 2.18 will be considered the supported long-term release (LTR) through June.
  • When 3.0 is released in a few weeks it will be considered the latest stable version.
  • 3.2 will become the LTR in June when it is released.
  • Starting on February 23rd you will be able to download and install it. Remember you can have multiple versions installed with no conflicts. I encourage  you to install it in a few weeks and begin to explore it! You won’t want to go back.

NOTE: QGIS 3 projects won’t be entirely backwards compatible with QGIS 2.x. So if you are going to open an existing project in QGIS 3, be sure to click Project –>Save As and save a new verion of the project for use in QGIS3.

A Busy Summer with a QGIS Conference in Denmark and FOSS4G in Boston

This summer Kurt Menke first attended the 3rd Annual QGIS User Conference, Hackfest and Developer meeting in Denmark. From there he traveled to Boston to attend the Free and Open Source for Geospatial (FOSS4G) International Conference. 

TriptoNodebo

Trip Map Created in QGIS using Live Layer Effects

The QGIS conference was small and intimate and a lot of new information was shared by the developers about the future of QGIS.

1k0a4924

QGIS Conference

There was so much presented that this will be a separate future blog post. While there Kurt conducted a full day workshop on Data Visualization and Cartography in QGIS.

DG3tVwdXUAAnHgy

Kurt Menke teaching about Data Visualization & Cartography in QGIS

He shared many of the new sophisticated and powerful data styling tools now found in QGIS including: 2.5D, 3D, Live Layer Effects, Inverted Polygon Shapeburst Fills, Blending Modes, and some plugins such as Time Manager. Perhaps this could be a workshop shared with CHM partners at a future date? Some examples are shown below:

FeatureBlendingDK

Use of Blending Modes to highlight road density

Manhattan3D

Lower Manhattan displayed in 3D via the QGIS2ThreeJS plugin

Cyclones

Cyclones Annually from 1950 – 2015 in QGIS with the Time Manager plugin

In Boston Kurt presented the Community Health Maps project. The talk was well attended and there was a lot of interest. Fulcrum was a sponsor of the conference, and Kurt was able to meet with several of the Fulcrum representatives. While there he learned about Fulcrum Community. This is a new initiative designed to help humanitarian agencies, non-profits, NGOs, or Government entities. To begin you need to request a Fulcrum Community account. One important caveat is that data collected via a Fulcrum Community account is anonymized, free, and open to all by default. It is essentially an initiative that will help in larger crowd sourcing efforts. More details will be forthcoming as Kurt explores this and how it may apply to Community Health Mappers.

This month (September), Community Health Maps will be travelling to the University of Connecticut (Community Medicine and Health Care) and to Miami to teach workshops. The workshop at the University of Connecticut will be to a large diverse audience. The Miami workshops will be focused on showing community members how to map damage and issues related to King Tides.

Stay tuned for blog posts on: 1) the future of QGIS, 2) Fulcrum Community, 3) experiences in Connecticut and 4) Miami.

CHM Lab Exercises Updated!

One of the most valuable resources for Community Health Mappers remains the series of lab exercises created two years ago. Our workshops, while effective, are short and only scratch the surface of what you can do with mapping tools. They are basically a quick start guide to Community Health Mapping. The labs however, can be used as a resource to help you build your skills once you’ve taken the first steps towards mapping your community.

The technology changes rapidly. QGIS produces a new stable version every 4 months. Annually QGIS also produces a long-term release. Carto and Fulcrum also update their tools on a regular basis. This mean the lab exercises need to be updated to keep pace.

The good news is that this spring the labs were all updated and expanded. There is some foundational knowledge needed to really take the next step after a workshop. The current revised set of labs includes Lab 0: A Community Health Map Introduction and Reference. This lab has background on the Community Health Maps project and the workflow. It also contains a Glossary of GIS terms, and several appendices covering: A) available software, B) data sources and C) everything you need to know to better understand coordinate systems and projection.

The remaining labs are as follows:

Lab 1 covers field data collection and has been updated to work with Fulcrum. This has allowed us to unify the exercise into one document for both iOS and Android users.

Lab 2 shows you how to bring your field data into QGIS. This includes a tour of the QGIS interface, and how to map coordinate data stored in a spreadsheet.

Lab 3 is named Combining Field Data with other Organizational Data. It shows you how to work with coordinate systems in QGIS. It also covers how to join tabular data to the attribute table of a GIS layer. This is a step that often has to be done to merge socioeconomic data from the U.S. Census to census geography such as tracts or block groups. It concludes with a lesson on address geocoding. This is the process you use to produce points from addresses.

Lab 4 shows you how to do some basic spatial analysis. You learn how to clip data to your study area, measure proximity, query your data to select features and calculate areas/ density.

In Lab 5 you learn how to use some of the great data visualization techniques found in only in QGIS. The lab then walks you through how to compose a map. Along the way you learn some data styling tricks and how to use the Print Composer.

The series concludes with Lab 6 Data Visualization with Carto. Carto underwent a major update and rebranding since the first edition of these labs were created. You can use this exercise to see how to work with the new Carto Builder interface and tools to create an online map of your results. It covers uploading your data, styling and sharing your map with others.

The four labs that deal with QGIS have been updated to include some exciting new features that have been added to QGIS in the last year. Links to the lab data are included. So head to the Resources page and build your Community Health Mapping skills!

CHM Conducts Three Workshops in Maryland

Last week Kurt Menke traveled to Maryland. Two workshops were held at the Prince Georges County Department of Social Services for people working on homeless issues. All attendees were novices to mapping technology. However, in the first hour they all built a data collection form in Fulcrum and went outside to collect some data around the building.

file-mar-02-9-35-57-am

Prince Georges County Community Health Mappers

The attendees represented a variety of organizations including many working with YouthREACH Maryland. REACH is an acronym standing for Reach out, Engage, Assist, & Count to end Homelessness. It is an effort to obtain accurate, detailed information on the number, characteristics, and needs of unaccompanied homeless youth in Maryland. Other organizations represented at these workshops included:

  • Maryland’s Commitment to Veterans
  • Maryland Department of Planning
  • Prince Georges Community College
  • St Ann’s Center for Children, Youth, and Familes
  • Maryland Multicultural Youth Center
  • So Others Can Keep Striving (S.O.C.K.S)
  • Sasha Bruce Youthwork
  • Lifestyles of Maryland.

In the final two hours of the workshops attendees learned how to map the data they collected in both Carto and QGIS. We also had time for a brief discussion about how CHM could be used in their projects. There were a lot of ideas shared about how the technology could help community engagement.

file-mar-02-9-27-09-am

The afternoon workshop attendees feeling accomplished after completing their Carto maps!

After the two PG County workshops, CHM traveled across the Chesapeake Bay bridge to Salisbury University on the eastern shore.

file-mar-02-9-27-49-amv2

The following morning we held a workshop geared towards social work students at Salisbury University. Attendees went through the CHM workflow and were introduced to Fulcrum, Carto and QGIS. Below is a map of data collected around the student center in Carto.

2017-03-02_095000

Salisbury University Data Collection in Carto

The workshop concluded with a short introduction to working with data in QGIS.

2017-03-02_094159

Salisbury University Data Collection in QGIS

The next scheduled workshop for the Community Health Maps team will be at the Teaching Prevention 2017 Conference in Savannah, Georgia. That conference takes place from April 5-7th. If you are interested in learning this technology this workshop will be a great opportunity!

New Year Will Bring Updated Labs Including Lab Zero!

It has been 2 years since the Community Health Maps (CHM) lab exercises were first produced. Software changes quickly, and over the last two years the tools involved in the CHM workflow have undergone many changes. For example, this fall the pricing scheme for iForm changed. Though it is still a good product, this price increase puts it out of the category of low cost software. The companion site formhub.org no longer exists, making ODK Collect more difficult to work with. Fortunately Fulcrum is a fantastic alternative to those two data collection apps. QGIS has released 5 new versions and is now at version 2.18! CartoDb has been rebranded as Carto and has a new interface.

ac3b0a08203e87505a823b0d8a0895d44489f916.png

The QGIS 2.18 Splash Banner

All these changes means it is time for all the lab exercises to be updated. Lab 1 will now be a single lab for both iOS and Android users with Fulcrum. Labs 2-5 will be updated to QGIS 2.18. Lab 6 will be updated to Carto’s new interface. The set of companion videos will also be redone and updated.

Many have worked through these labs and some provided feedback. This information is being used to improve the labs as they are updated. One new item will be Lab Zero. While the CHM workflow is intuitive, it has been suggested that more background information could be useful. Lab Zero will be a companion reference document to the CHM labs. It will contain: A) information on the background of the CHM project, B) software installation instructions , C) a glossary of terms, D) more thorough descriptions of some technical topics like coordinate reference systems, E) a description of how to interact with the QGIS community to get additional help, and F) a list of data resources. This work is in progress and will be ready this spring. Stay tuned!

Baltimore DIabetes.png

An image from the last task in Lab 4 showing the density of diabetics in Baltimore City along with dialysis clinics

 

CHM Has a Busy Fall with Workshops and Storms!

We had a busy fall giving three workshops in September and October. First Community Health Maps traveled to Spokane Washington to conduct a half day technical workshop at the National Tribal Forum for Excellence in Community Health Practice.

img_1639

This event was organized by the Northwest Portland Area Indian Health Board and supported by the Robert Wood Johnson Foundation. We weren’t certain who or how many would attend, and I expect attendees weren’t entirely sure what Community Health Mapping was all about either. However, it turned out to be a very engaged group representing tribes from many regions of the country. Within a few hours everyone was able to:

  • Create a field data collection form in Fulcrum
  • Collect some data around the conference center on their smartphones/tablets
  • Make a map of their data in Carto
  • Learn how to bring the data into QGIS

This was a typical CHM workshop with most never having done any mapping work before. As such it was a very empowering experience for the participants to learn how to use this technology to map their community in just a few short hours.

From there we traveled to Honolulu, Hawai’i to give a workshop organized by Papa Ola Lokahi. There were two hurricanes (Lester and Madeline) heading towards the islands. Fortunately they both veered off and didn’t cause any damage or disruptions! The attendees came with a plethora of ideas on how mapping could fit into their work including:

A) tracking scholarship recipients of the Native Hawaiian Health Scholarships program,

B) supporting the Native Hawaiian Cancer Network,

C) mapping Dr. Ben Young’s research on historical tracking of Native Hawaiian Health professionals,

D) mapping Native Hawaiian Homelands to provide resource data to providers and community members, and

E) use the CHM “train the trainer” model to increase ongoing trainings for service providers including community health outreach workers and patient community navigators in Hawai’i.

img_1004

Papa Ola Lokahi staff learning  how to map their community with tablets and smartphones

After a brief break we headed to Seattle, Washington, again there were two separate storms including, the remnants of Typhoon Songda, bearing down on the region threatening to disrupt power and services! Again fortunately the storms didn’t make a direct hit on the area and the workshop proceeded on schedule.

We went to train students in the capstone course of the Community Oriented Public Health Practice Program at the University of Washington. This is our second year supporting this program. The first year was a huge success with two students attending the APTR Conference and presenting their work.

Like last year we had  a full house with students eager to learn about community mapping. Both first year and second year students were in attendance. Several second year students will submit proposals for consideration, to receive a stipend and support for using Community Health Maps in their capstone projects. Jamie Smeland is the first of the group to be awarded the stipend for her capstone project entitled, “Honoring the Collective Wisdom: Documenting a Cross-Racial and Intergenerational Movement to Shift Power to Youth and Parent Leaders to Improve Educational and Health Outcomes for Students of Color in South Seattle & South King County.” We look forward to working with these students in the coming months.

IMG_2178.JPG

UW Community Oriented Public Health Practice Program capstone students learning the Community Health Maps workflow

In the near future we will be offering an updated set of Community Health Mapping labs and a platform for CHM webinars. Stay tuned! In the meantime if you are interested in Community Health Maps and/or receiving CHM training contact John Scott (jcscott at cpsc.com) for more details.