Category Archives: Web mapping

CartoDB Rebranded as Carto

Community Health Maps has long recommended the use of CartoDB for those interested in low cost online mapping and data visualization. In fact, CHM caught the beginning of this wave because CartoDB wasn’t even launched until 2012!

CartoDB

Original CartoDB logo

Early last month (July 2016) CartoDB was rebranded as Carto, which includes a new logo. However, once you get beyond the new logo your current account page including your data and maps remains unchanged.  You can still build maps the way you always have in what is now known as Carto Editor.

Carto

New Carto logo

The main difference is that Carto now offers up a new interface named Carto Builder. The good news for Community Health Mappers is that their goal with Carto Builder is to introduce an updated interface. One that still does not require complex geospatial skills and programming. With Carto Builder they aim to make Location Intelligence (LI) more accessible to more people.  This means it will give you point and click access to deeper analysis of your data. Builder will have all the functionality currently found in Editor along with the new tools.

Eventually Carto Editor will be phased out and Carto Builder will be the interface everyone uses. You can request early access to Carto Builder here: http://go.carto.com/request-beta-access. New users of Carto will be given access the the Carto Builder in phases, over the next several months. All existing maps and data will be seamlessly migrated to the new interface. The following page answers Frequently Asked Questions about the migration from Editor to Builder: https://carto.com/docs/carto-builder/faqs/

Once the migration is complete I will post about the new functionality. Stay tuned!

 

White House Announces the Opportunity Project

This week the White House announced the Opportunity Project. It is an open data initiative geared towards empowering communities with data and tools to improve economic mobility. Open data is the data equivalent of open source software. It is licensed so that it is freely available to use by anyone.

The main page for the project can be found here: http://opportunity.census.gov/.

Opportunity Project Website

Opportunity Project Website

It includes links to sources of open data and online tools built on open data, ,many of them map based. This looks to be a great resource for Community Health Mappers!

 

Community Health Mapping: A New Year Review

To start the New Year I thought I’d begin with a review of Community Health Mapping (CHM). There are a lot of new project partners, and I thought it would be a good time to give a project overview. CHM is a collaborative effort between the National Library of MedicineCenter for Public Service Communications and Bird’s Eye View. The National Library of Medicine is funding the initiative.

The overall goal is to empower community organizations serving vulnerable or underserved populations with low cost, intuitive mapping technology. Therefore we’ve been working with programs organizations who:

  • Focus on vulnerable populations
  • Frequently use and collect data
  • Need effective, scalable & easy to use mapping tools
  • Lack resources (i.e., for proprietary GIS training & software)

We have identified a suite of tools that allow you to collect custom field data, analyze that data, combine it with other spatial datasets, and generate both static maps and/or dynamic maps on the internet. This allows organizations to collect and work with their own data, and if appropriate, share it with others. CHM involves three components that meet all basic mapping needs:

  • Field Data Collection
  • Desktop Analysis and Cartography
  • Internet Mapping
Community Health Mapping Workflow

Community Health Mapping Workflow

A given project may not require all three, however, collectively these components address the basic needs of all mapping projects.

Field Data Collection:

Rather than focusing on the use of expensive GPS receivers, we recommend the use of smart phones and tablets for these reasons:

  • Most community-based organizations already have them!
  • Many know how to use them
  • They’re intuitive
  • They’re portable
  • They come with an on board GPS receiver (iPhone 5 uses GPS + GLONASS)
  • Have on board cameras
  • Can connect to wireless networks
  • Access to the internet
  • Email is available
  • “There’s an app for that!”
SmartPhones and Tablets vs. Traditional GPS Receivers

SmartPhones and Tablets vs. Traditional GPS Receivers

Of course an important consideration is horizontal accuracy. You can read our blog post on that topic to see if mobile smart devices meet your project needs.

When collecting data you need to be able to develop your own custom data collection form. The top three mobile apps we have found are:

Desktop Analysis and Cartography:

After community field data collection, the next step typically involves bringing the data into a desktop GIS. This is the middle step in the workflow. Here the data can be viewed against basemaps such as Google or OpenStreetMap, and combined with other organizational data. This is also where analyses (proximity, density etc.) can be conducted. Presentation quality maps can also be generated in this step.

The software we found to be the best fit is QGIS. This is an open source desktop GIS software. It has many strengths:

  • It can consume many kinds of data, including all the data that would come out of the field data collection apps.
  • It is both intuitive and robust.
  • It has a large suite of geoprocessing tools for analyzing data.
  • It will run on Windows, Mac, or Linux.
  • It is free to download and install.
  • It is well documented.
  • There is a large user community.
  • New functionality is being continuously added. New stable versions are being released every 4 months!
Baltimore Diabetes Data in QGIS Desktop

Baltimore Diabetes Data in QGIS Desktop

Web Presentation

Often you may want to present an interactive map of your results. Interactive means the map reader can zoom in/out, pan the map and turn layers off and on. For this we recommend CartoDB.

You can sign up for a free account, which gives you 50Mb of storage space. Data can be collected with a smart phone or tablet and brought directly into CartoDB.  It is a very intuitive platform. You can literally drag and drop a spreadsheet onto the CartoDB page and have the data upload to your account.  It will accept the most common geospatial file formats including: spreadsheets and comma delimited text files with addresses or coordinates, KML/KMZ, GPX, and shapefiles.

CartoDB also has great documentation including:

Baltimore Diabetes Data in CartoDB

Baltimore Diabetes Data in CartoDB

In Conclusion

This blog has a lot of resources including reviews of mapping technology and case studies. You might begin by clicking on some of the links in this entry. We are also working on a 6 lab CHM curriculum that interested parties will be able to use to hone their skills. Stay tuned for that!

We are always looking for new partners and continuously work to support current project partners. If you are interested, or have questions please don’t hesitate to contact John Scott (jscott at cpsc.com) or Kurt Menke (kurt at birdseyeviewgis.com). Most importantly get out and do some mapping in 2016!

 

 

 

Using CartoDB for Beautiful Online Maps

CartoDB is an online cloud based platform for storing and visualizing spatial data. It is the perfect tool for the third part of the workflow (outlined in the Introduction). You can sign up for a free account, which gives you 50Mb of storage space. Data can be collected with a smart phone or tablet with iForm, and brought directly into CartoDB.  It is a very intuitive platform. You can literally drag and drop a spreadsheet onto the CartoDB page and have the data upload to your account.  It will accept the most common geospatial file formats including: spreadsheets and comma delimited text files with addresses or coordinates, KML/KMZ, GPX, and shapefiles. Below is an example of a spreadsheet of Baltimore Dialysis Centers in CartoDB. This shows the spreadsheet in Data View .

CartoDB Data View

CartoDB Data View

After telling CartoDB which columns contain the latitude and longitude values, the data can be viewed in Map View (below). Here the default Positron basemap is being used. There are a variety of basemaps to choose from including imagery, Stamen maps and Nokia maps.

CartoDB Map View

CartoDB Map View

Once multiple data layers have been uploaded you can create a visualization. Below is a map focusing on Balitmore Diabetes. It includes Baltimore neighborhoods classified by the number of diabetics, food deserts and dialysis centers.  CartoDB provides wizards and other tools for styling your data. The dynamic map can be accessed here: http://cdb.io/1G4xP7j

CartoDB Visualization

CartoDB Visualization

Visualizations can be shared via hyperlinks and embedded into webpages.  CartoDB also has great documentation including:

Sign up for a free account and take it for a spin. On a related note Community Health Maps is almost done with a complete curriculum for community health mapping. It consists of six labs. The final lab shows you how to work with CartoDB from setting up an account to sharing a visualization. Stay tuned!

Technology + Youth = Change


by Chad Noble-Tabiolo

It all started in May 2013 when I watched the documentary entitled Revolutionary Optimists on PBS’s Independent Lens. It showed how young people from a slum in Kolkata, India were able to map the deficient and unsafe water taps in their community, in order to plea with the government for more and safe drinking water lines. The film highlighted technology in an unconventional way. It showed GIS-technology as an innovative tool to mobilize youth for social change.

This heralded the beginning of a partnership with Map Your World to develop a mapping project in the Philippines in the summer of 2013. Through coordination with domestic and international partners, the youth mapping program was implemented in Southville 7 — an impoverished and neglected slum community, about three-hours south of metro Manila. The issues faced in Southville 7 ranged from lack of access to jobs, water and electricity to food insecurity and child and maternity health; and because of a lack of response from both the government and non-governmental sectors, the project was aimed to raise awareness and demand change.

In just a few weeks, a dozen phones were donated. Youth, ranging from 15 to 23 years old, were trained to go house-to-house to collect data. By the end of three months, 3000 families were surveyed and the needs of the community were mapped. Depicted below is Map 1, which shows the families who have direct access to water in their homes.

Families who have direct access to water in their homes.

Map 1 – Families who have direct access to water in their homes.

Because of the unequal distribution of resources, it was evident who had direct access to water and who did not. Map 2 shows those families who did not have direct access to water. These families had to walk more than 1 kilometer to a communal water tap.

Families who had to walk more than 1 kilometer  to water.

Map 2 – Families who had to walk more than 1 kilometer to access fresh drinking water.

Lastly, Map 3, represents the top four needs according to the three different subdivisions or sites in Southville 7.  Collectively these maps and data provide an opportunity for proper and adequate planning for public health infrastructure and needs.

The top four needs according to the three different subdivisions or sites in Southville 7: Jobs, Water, Electricity and Healthcare.

Map 3 – The top four needs according to the three different subdivisions or sites in Southville 7: Jobs, Water, Electricity and Healthcare.

The Android mobile phones used by the youth were powered by open-source applications for GPS-mapping and data collection. ODK Collect or Open Data Kit was the data collection tool utilized in the project. It can be found on the Android market. (NOTE: This tool is also described in the Community Health Mapping blog post on Field Data Collection). This tool is functional only after uploading a survey form that is created in Microsoft Excel and uploaded to the companion site www.formhub.org. The maps were created online with Map Your World, an online community mapping tool inspired by the Revolutionary Optimists documentary.

Map Your World Banner

Map Your World Banner

In the end, the 30 youth involved in the mapping project were able to accomplish an endeavor that many people in their community had not expected. They were able to successfully map who in their community had access to water, electricity, jobs and vaccination for children under five years old, among others. They became leaders who are now equipped with leadership and technological skills that many in their community lack. They were empowered to raise awareness about the social injustices and health inequalities existing among them.

One of the community mappers with an array of Android phones.

One of the community mappers with an array of Android phones.

The Southville 7’s mapping work was primarily a vehicle for instilling hope, and the use of GPS/mapping-technology offered an opportunity for the youth to be the voice for their community. According to one youth, “For me, mapping is like knowing. Knowing the problems, and how people are coping with them. Through the work we can open the eyes of the people, not only the things that can help them, but things that can help us all.

Youth mapping their community

Youth mapping their community

Display and Share Your Maps Online via GIS Cloud  

The third step in the workflow (outlined in the Introduction) is to share your maps online via GIS Cloud.  This is an online mapping platform. You can sign up for a free account, upload your data, and share your maps with others. The maps will be dynamic, meaning you can do things like pan and zoom, turn layers on and off and identify features.

GIS Cloud Homepage

GIS Cloud Homepage

Pricing

Your free account comes with a Map Viewer and Map Editor and gives you 100Mb of space in your cloud account. If you require more space you can upgrade to Premium subscription which offers 1 Gb of space. Premium accounts cost $55/month.

Data Upload

GIS Cloud accepts all common GIS file formats and the data upload section is very intuitive. You can zip all your data and just upload the zip file and GIS Cloud will take care of the rest. You can even drag and drop files anywhere in the browser and they will upload to your account. Once uploaded it offers a nice range of options for symbolizing your data.

GIS Cloud Symbology Options

GIS Cloud Symbology Options

Map Editor

Here you have a variety of tools available including those for data editing, feature selection, basic analysis, table joins, geocoding addresses. It even has a database manager. You can create new layers in your cloud account and edit them here. With the analysis tools you can compute areas, measure proximity of one feature to another, buffer a layer by a certain distance, and create density maps.

GIS Cloud Map Editor Toolbars

GIS Cloud Map Editor Toolbars

Map Viewer

Here your data can be viewed against basemaps such as Google and OpenStreetMap. Your map can also be shared and published. There are several ways to share your maps. The two easiest methods are to provide the link to your map, or embed the dynamic map in a web page. Clicking the Share and Publish button opens the window below. Here you are provided the url to your map viewer and the javascript for embedding the map into a webpage. I would have embedded a dynamic map here,  however, WordPress does not allow bloggers to post JavaScript on WordPress.org blogs. You can also share your map with other GIS Cloud users by Publishing the map. Click on the image below to open up the ENHIP Schools in a GIS Cloud Map Viewer window.

GIS Cloud Map Viewer

GIS Cloud Map Viewer

Resources

Our Resources page has a GIS Cloud document that covers uploading data, styling data and sharing a map.

There are additional online mapping platforms such as CartoDB and MangoMaps. We found GIS Cloud to be the best combination of being intuitive yet powerful. However, all three options have free licensing levels. So you can try them yourself and decide which works best for you. These other options will be covered in future posts. Happy mapping!