September 8th, 2016
A Search Engine for Congress
September 8, 2016 by Susan Smith
The computer can show you how one senator has co-sponsored more bills of a Senate Majority Leader than any other senator over a period of years. It can also show you who has the best record of getting bills out of committee – information that took years in the making to obtain ten years ago. Today, with a dashboard platform called Quorum Analytics, a startup developed a year ago by two then-Harvard undergraduates, Alex Wirth and Jonathan Marks, customers can have this information at their fingertips for far less time and money.
In our third article in this series: Offline Mobile Map Basics: Editing Map Layers Offline, we discussed editing map layers when offline. Layer feature add, update, delete and attachments were at the core of the conversation. In this, our fourth article in the offline mobile map series, we will pull all together and discuss your options for working with mobile maps.
Offline Mobile Map Basics: What are your Choices?
Today there are three mobile offline ArcGIS choices: web, hybrid and native. Each has its own own advantages and disadvantages
1. Offline Mobile Map Web Apps
Mobile adoption in the GIS world has taken place slower than many would have expected. The GIS landscape is changing so rapidly, mobile was just one more ball to juggle. But things have begun to change. We are now in a world of multiple devices. And not just smartphones and tablets, also wearable’s, smart TVs etc. There is increasing demand to have access to GIS anywhere, on any device.
Today there are three mobile ArcGIS choices: native, hybrid or web. Each has its own own advantages and disadvantages. If you are looking to have a mobile ArcGIS app developed the right approach need be made on a case per case basis. In this article we will discuss these 3 options; the pros and cons.
Mobile ArcGIS Choices: Native, Hybrid or Web
1. Native ArcGIS Mobile Apps
Native ArcGIS mobile apps are developed specifically for one platform. They are written in the native language of that platform. So Objective-C for Apple (iOS) devices, Java for Android, .NET for Windows. Functionality, user experience and performance are key advantages of native ArcGIS apps. But they are more complex and expensive to build and are not cross-platform compatible. A typical use case for a native ArcGIS mobile app would be: “We will only ever use iPads in our organization, and we are working with large data-sets. Performance is key”.
In our second article in this series: Offline Mobile Map Basics: Offline Base-Maps and Layers, we discussed how to take base-maps and layers offline. From Esri-land Tile Packages (TPK) and Feature Layers were key discussion areas. In this third post in the series we will dig a little deeper and focus on offline mobile map editing.
Editing Map Layers Offline
As we have discussed in the previous two posts, base-maps are static. That means they are simply images or tiles stitched together to provide context. Layers are what sit on-top of base-maps and if the are Feature Layers they can be edited. What do we mean by edited? There are three types of editing:
1. Add – Imagine you are working in the pipeline industry, and are viewing on your iPad the current pipe network in an ArcGIS map app. You are currently extending the pipeline; adding an additional line. You will need to update the pipeline layer to include this new section of pipe. That means adding a new line feature.
2. Edit – You are out inspecting a power pole. When you tap the point feature which represents the pole in you mobile map app a list of attributes appears, these describe the pole; type, last inspection date etc. You notice the pole is listed as metal when you can see it is actually wood. You need to edit this features ‘material type’ attribute so it is accurate.
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