Mergin Maps tracks project version history so you can download a previous version of a project if you need to.Use Google Fusion to create and share web maps like this one:įor a brief introduction to the EPA’s Toxic Release Inventory (TRI) and GIS: Download all QGIS Tutorials.Īlso, all materials for the spring 2014 GIS course, dedicated to the spatial analysis of the TRI, as well as the Summer 2014 and Fall 2014 Introduction to GIS and Advanced GIS courses are publicly available on our course Google Drive Site (2014), Spring 2015 course materials are also available (currently in progress).Ĭlick here for tutorial videos that guide you through downloading, extracting, adding and analyzing Toxics Release Inventory (TRI) data in a GIS.Ī growing number of spatial data tasks can be accomplished with web GIS applications. When you sync a project, changes that have been made by other users and devices since you last synced are fetched and any changes you've made are pushed.Ĭhanges are merged safely and easily from different users, even when they edit the same feature. Synchronising changes between users and devices is a core principle of Mergin Maps. In a few moments your changes are safely stored in the cloud: Rename the layer called Survey to Survey notes (its name is a little ambiguous). We'll now save the changes we've made here and sync the project back to the cloud.
In the next tutorial we will see how this project looks on Mergin Maps Input.
TUTORIAL QUANTUM GIS UPDATE
Update the form for the photo attribute as follows:
TUTORIAL QUANTUM GIS HOW TO
Refer back to the last section if you cannot remember how to do this. Open the layer properties of the hedges layer To achieve this we'll need to set its widget type to Attachment: The attribute itself is stored as text but we'll use it to attach photos to surveyed features. Our hedges layer as an attribute called photo. We recommend not allowing users to edit this attribute.Ĭlick OK to close the layer properties dialog. Optionally experiment with the Alias setting which can be used to override attribute names.įid is a special attribute used to uniquely identify features. Value is how the data will be stored in the underlying dataset and Description is how it will appear to the user.