Tag: Web Mapping
Our most recent map update greatly expands the large scale coverage of the Dark Gray Canvas Base and Reference layers. Europe, including Russia, was added at scales ~1:288k down to ~1:9k (levels 11 to 16). This is the first ArcGIS.com basemap … Continue reading
Just as the dark sky at night allows the stars and nebula to shine, a new basemap from Esri allows you to create exciting new maps of your data. The Dark Gray Canvas basemap is now available on our production servers … Continue reading
Recently we blogged about a beta service for a Dark Gray Canvas basemap, available for you to try out and comment on, prior to a full release as an Esri Basemap. That blog can be found here. The original release … Continue reading
Esri has released a new Dark Gray Canvas basemap (as a beta) for its customers, partners and developers to use. Developed from the Light Gray Canvas basemap, the Dark Gray Canvas version opens up an opportunity to use a different type … Continue reading
by Nathan Shephard and Kenneth Field
November 22nd 1963. John Fitzgerald Kennedy was assassinated by Lee Harvey Oswald while in Dallas, Texas. It’s been 50 years since the cataclysmic event in Dealey Plaza and the fascination, conspiracies and consistent speculation on what happened and why have been ever-present in the intervening years.
Here, we present JFinteraKtive, an interactive 3D Web Scene of the shocking moments that changed the world we live in.
We have geocoded a spreadsheet and styled an informative map that comes alive in the web environment. But why are we making web maps in the first place? Is it because we want to show off the latest capabilities of ArcGIS online? No! We are trying to solve a problem. The problem we had was: spatially enabling text-based information that is locked down in an organizations’ spreadsheet, without access to specialized skills or software. We have successfully authored a map based on this spreadsheet, now we want to SHARE the map and unleash its potential with a variety of web mapping applications. Then we will allow our audience, the users of our maps, to utilize some interesting GIS
capabilities. How are we going to do this? There are several methods, depending on your needs:
- Socializing your web map
- Embed your web map
- Create a presentation for your web map
- Design your own stand-alone web mapping application
Socializing your web map
There are many ways to share your map with others. The simplest way is to share a URL such as http://bit.ly/sBau3H. It’s easy to “socialize” or promote your web map using the Facebook and Twitter buttons on the web map description page (seen in screenshot above) once the map has been made public. This can also be done from the map itself in the Web Map Viewer or ArcGIS Explorer Online by clicking on the respective buttons:
By sharing our map in this way, we allow others to view and collaborate on projects that provide additional context or meaning to our original web map. Once shared, another user could add a Map Service using the “Search for layers to add” functionality. Here (below) we used the keyword “demographics” to search for what layers are freely available using ArcGIS Online. We added the USA Tapestry Segmentation thematic map, which classifies U.S. neighborhoods into 65 segments based on their socioeconomic and demographic composition. This could be useful for describing how community-oriented policing fits into the community itself.
Embed your web map
Another way that web maps can be useful is if we want to embed it into an existing website or blog; again we use the Share button and simply copy and paste the map’s HTML code into the website. This may be a job for your agency’s web master or administrator, but you can see what this might look like at the membership page for Major Cities Chiefs or embedded in the blog as we have done here.
Create a presentation for your web map
Sometimes, the best way to share spatial information is through a story. As the proverb goes—“Tell me a fact and I’ll learn. Tell me a truth and I’ll believe. But tell me a story and it will live in my heart forever.”
With ArcGIS, you can use your web map to create and give a dynamic presentation that tells an interesting and informative story. This presentation capability is map-centric and has been deployed by Law Enforcement agencies for briefings, both informative and tactical in nature (CompStat, Community Briefings, etc.). This has been helpful for agencies in lieu or in conjunction with traditional presentation formats (like Microsoft PowerPoint). Here we will use ArcGIS Explorer Online in presentation mode to do just that—first, open your web map in ArcGIS Explorer Online. Once your map is open in ArcGIS Explorer Online, click the Presentation tab:
To tell your story, capture new slides, change title headings, switch out basemaps, and add other layers as you wish. When you present your story, you will have a presentation to deliver your message from any computer or even a mobile device. Of course, this presentation can be shared via this URL hyperlink.
Design your own stand-alone web mapping application
Web mapping applications allow you to bring your web map to life. The ArcGIS Explorer Online presentation is one form of an ArcGIS Web Mapping Application. Again, using the Share button (see below) in the ArcGIS Online Viewer, we can now create our own web application with customizable templates and ArcGIS Online as our web host.
We can preview our web map in each of these applications, download the source code (for web programmers), or publish the web application on ArcGIS Online. Now you can share your web mapping application and configure it as you see fit. Here we used the ‘Chrome—Twitter’ template to produce an application that can be useful for monitoring the Occupy Wall Street movement in our area. One way police agencies can leverage social media is to monitor large gatherings and prepare for emergencies ahead of time. Other web mapping application templates allow you to edit GIS data, visualize time enabled data, and view maps side-by-side. Keep an eye on the templates, since new ones are added regularly.
It all started with a spreadsheet and now, GIS is everywhere!
To summarize this blog series for Public Safety users, we have just performed and outlined the following steps to become a web-mapping pro:
The ArcGIS system is pervasive and you have just utilized a critical component. This approach is scalable and will work to solve problems at an individual level all the way up to integration with your Organization in the very near future! Happy sharing and please leave comments and questions for your authors.
Contributed by Rachel Weeden, Solution Engineer Manager, and Paul Doherty, Public Safety Technology Specialist
By Kenneth Field, Esri Research Cartographer
In Part 1 of this blog entry we showed you how to use the Feature Outline Masks tool to convert annotation feature classes to polygon feature classes in ArcMap which can then be added to your ArcGIS.com web map as an operational overlay. This is a great way of adding labels to your web map (figure 1).
By Kenneth Field, Esri Research Cartographer
Labeling is important for most, if not all, maps so people can interpret and describe patterns they see and to relate them to places. In online web maps, labels are usually only seen as part of the basemap (and un-editable) or as part of the textual information in a pop-up (and un-seen until opened). But how do you add labels to features in ArcGIS.com Map Viewer so they appear as part of the map? In part one of this two-part blog entry we describe how you can make your own label operational overlays using the Feature Outline Mask tool on annotation feature classes in ArcMap to convert labels to feature geometry. When these are converted to shapefiles they can be added to web maps you make on ArcGIS.com without having to create and publish map services using ArcGIS Server. Part two of the blog entry will take the approach a stage further by showing you how to add symbols and other graphics to your map as feature geometry.