Author Archives: Chris Counsell

About Chris Counsell

Enterprise Senior Lead Consultant Support | Training | Client Success | Professional Services

Which ArcGIS Online items are consuming the most credits through storage?

As your ArcGIS Online organization grows, so does the amount of content, and subsequently the credit consumption to store it. It is important for Creators to understand which types of items consume storage credits at a higher rate, and for administrators to identify which users and items are incurring the highest usage.

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GDA2020, ArcGIS Online and the Web Mercator Dilemma

In ArcGIS Online Map Viewer, all layers in a web map inherit the coordinate system of the basemap. WGS 1984 Web Mercator (auxiliary sphere) is the spatial reference of basemap services in the default Esri basemap gallery, meaning this is the default web GIS coordinate system. Layers also have their own spatial reference and transformations defined at a service level. When you add layers to the Web Map Viewer, an on-the-fly reprojection is performed to align your data with the coordinate system of the basemap.

When publishing data to web GIS you need to consider what spatial reference will be used to store the data at a service level, how the publishing process may affect it, as well as what transformations (or lack of) will be applied when the layer is displayed in a web map with a datum.

It is also important to understand GDA2020 and its relationship with web GIS. The de facto WGS84 in web GIS brings some challenges not unique to Australia or ArcGIS. Failing to address these challenges may result in data misalignment.

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Working with Coordinate Systems and Transformation in ArcGIS Pro

When you work with spatial data in ArcGIS Pro, you add datasets as layers to a Map. The map has a defined spatial reference, and this is what ArcGIS Pro uses as it attempts to align your data to the map. It is important to understand how this behaviour works, how to ensure your data in a different datums have correct transformations applied, and what options are available to change default behaviours.

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Introduction of GDA2020 to ArcGIS and how to install additional transformations

Australia has recently moved towards a new datum, the Geocentric Datum of Australia 2020 (GDA2020), to facilitate a more robust, accurate and capable datum that is more closely aligned with the expectations of a modern, connected Australia.

The introduction of a new datum impacts all areas of the software. Esri support for GDA2020 was progressively added as the datum parameters and associated transformation methods were released. All current releases of ArcGIS Pro (2.2 onward) and ArcGIS Desktop (10.6.1 onward) now support GDA2020, the associated projections, and transformations between it and GDA94.

An additional installation is required to support the NTv2 grid-based transformation methods released for GDA94-GDA2020.

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Understanding Spatial References in Australia

GIS data must accurately represent real-world locations to be useful. To do this, you need a standard framework for defining location – a coordinate system. All spatial data utilises a coordinate system to position itself relative to your map and other data. However, coordinate systems are frameworks. They are models, spheroids, imperfect approximations of the shape of the Earth with all its bumps and curves as it changes with time. When working with spatial data you need to consider how a GIS positions this data against reality using coordinate systems.

By better understanding coordinate systems, you will be able to manage your data in a way that increases the accuracy of your maps and the work that you do with them. This blog is the first in a series taking a closer look at using Australian spatial references in ArcGIS. We will start by looking at geographic coordinate systems, projections, and transformations.

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Moving to ArcGIS Field Maps in 2021 | retirement of Collector, Explorer and Tracker

ArcGIS Field Maps was launched in October 2020 and replaces the functionality of ArcGIS Collector, ArcGIS Explorer, and ArcGIS Tracker on the iOS and Android mobile platforms. These products (Collector, Explorer, Tracker) are currently available to download and are fully supported; however, they will be retired in December 2021.

That leaves us with three premier field data collection apps for ArcGIS:

  • ArcGIS Field Maps: map-centric data visualization and collection
  • ArcGIS Survey123: form-centric data collection
  • ArcGIS QuickCapture: button-centric rapid fire data collection

What do I need to do to migrate and how do I start?

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Act Now: Preparing for HTTPS Only enforced in ArcGIS Online

ArcGIS Online will enforce HTTPS Only on all organizations on December 9 2020 (AEST).
This important security update is likely to affect some ArcGIS Online organizations, their content, software and custom solutions.

Customers affected by this update who have not enabled HTTPS Only for their ArcGIS Online organizations as yet, should act now. Preparing and testing now will help avoid surprises before the policy is enforced on December 9 2020 (AEST).

Am I Affected?

HTTPS Only is a configurable setting in ArcGIS Online. It’s been enabled by default for newer subscriptions (from September 2018) and will be enforced for all organizations on December 9 2020 (AEST). The result is four categories for consideration:

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Survey123 for ArcGIS: Securing surveys and results

Survey123 for ArcGIS is a complete, form-centric solution for creating, sharing and analyzing surveys. It is used to create smart forms and can be submitted from a web browser or dedicated Survey123 for ArcGIS native app by a defined audience.

Surveys can be designed on the Survey123 website or via the desktop with Survey123 Connect. Once designed, the survey is published, and in this process a survey form and service layers are created in the designer’s portal (ArcGIS Online or ArcGIS Enterprise). The survey form item represents the questions and survey settings, and the survey layers storing the submitted data.

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