GIS Blog

Anatomy of a Web Map

In this post, we’ll have a closer look behind how web maps combine map services with web pages. In an earlier post we looked at some of the web maps working off of our GIS server.  In this post, we’ll have a closer look at just how web maps work.  We’ll use the staff/student addresses…

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Our (Web) Maps

The Lincoln GIS Server allows us to make GIS data and maps available to anyone with a web browser.  In this post, several of the web maps we’ve developed are presented. In a previous post we covered the idea of web services, which allow data layers to be served up to web browsers without needing…

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A Map of a Disaster

This is a post about the use of maps to tell a story.  One of the most famous maps ever produced recounts Napoleon Bonaparte’s invasion of Russia in 1812. So I’ve been reading a novel recently that revolves around Napoleon’s invasion of Russia, which by all accounts, was the final nail in the coffin of…

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Spatial Thinking – the Legal Case

This is a post about Spatial Thinking in the context of the application of justice in New Zealand.  Only a few pretty pictures to go with this one I’m afraid. Growing up in relatively small-town America, I always knew to be a bit careful when driving through the wop wops – one could never be…

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On-Line Training Courses for ArcGIS

This post covers the on-line tutorials available to LU users. The GIS team is often asked how people can learn how to do more stuff.  One of the perks of our ArcGIS site licence is that we can free access to a range of on-line tutorials from ESRI, the creators of ArcGIS.  These range from…

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Web Feature Services Part 2 – LRIS and LDS

Part 2 of a focus on Web Feature Services (WFS), this time on connecting to data from LRIS and LDS. A previous post covered the basics of connecting to Web Feature Services (WFS).  For this post, we’ll look specifically at how to connect to Landcare’s data portal (LRIS) and the LINZ data service (LDS, not…

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Web Feature Services – real data from the web to your desktop

This post looks at web feature services (WFS) where real data from internet sources can be added to your desktop for analysis purposes. In a previous post we looked at web services that could be added to a map.  While these are great for map making purposes, they do have their limitations, especially if you…

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How do I clip raster data?

This post covers how to clip out portions of raster grids (updated on 8 May). A previous post covered how to clip vector data (feature classes and shapefiles).  Another key skill is being able to clip out portions of raster grids, such as a DEM, or perhaps a TIF image.  We’ve got three options really…

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How do I Clip Data?

This post covers a very useful skill – clipping subsets of vector data from larger datasets (clipping raster data is covered in another post). As seen is some earlier posts, most of the data on the J: drive is at a national scale.  In many cases, though, you’ll be working at a much larger scale (and…

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How do I create a new feature class/shapefile?

This post covers an essential skill – creating new feature classes and shapefiles.  We’ll cover how to create a blank layer and then how to digistise new features into that. Creating you own data layers is an important part of most analysis projects, so in this post I’ll cover some of the essential steps in…

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