Yesterday evening, I had the pleasure of participating in a panel discussion on Clubhouse, hosted by Todd Barr and Jordan Cullen, and including Will Cadell of SparkGeo. Clubhouse seems to be a really convenient venue for setting up such a forum with low barriers to entry, so that was enjoyable. The topic of the discussion…
Tag: PostGIS
Analyzing Location Change Over Time in PostGIS
Following up on my previous post, I decided to attempt the same analysis in PostgreSQL. The analysis doesn’t make use of any spatial logic itself (yet), but I consider this a PostGIS post because it is using PostGIS geometries. In the past, I have noticed that BigQuery SQL is very reminiscent of that of PostgreSQL,…
Attribute Transfer in PostGIS Using Spatial SQL
Data conflation is a meat-and-potatoes task in most GIS workflows. There are numerous reasons one might need to get data from one data set into another. Perhaps you want to attach a new geometry type to existing attributes or a table. Or maybe you need to pull attributes from one or more data sets into…
Watching COVID-19 Data for Your County with PostgreSQL and Node
I have addressed the topic of triggered notifications a couple of times on this blog previously. I’ve taken the opportunity to apply the technique to a current use case – the ability to get notifications whenever the confirmed count of COVID-19 cases changes in my county or surrounding ones. I am basing this workflow on…
The One About PostGIS
James Fee and I released the next episode of our podcast this week. This month, we are taking a closer look at PostGIS and how you can get started with it. We’re both longtime users and huge fans of PostGIS, so it was fun to dig into it a little. You can check it out…
Refreshing a PostGIS Materialized View in FME
I am following up my previous post with an extremely simple example using FME to kick off the refresh of a materialized view (matview) after a data import. I had never used FME prior to coming to Spatial Networks, but now I’m hooked. I’m having a really hard time finding things it can’t do. As…
Working with Materialized Views in PostGIS
It’s been a few months since I’ve posted, owing mainly to getting my feet under me at Spatial Networks. About a month after I started, the company re-merged with Fulcrum, which had previously been spun off as a separate company. As a result, I’ve gotten to know the Fulcrum engineering team and have gotten to…
Personal Geospatial Workflows, July 2016 Edition
It’s hard to believe, but I last touched upon this topic over two years ago, when my family and I were living in our between-houses rental. One of the goals I had when building our current house was to create a space where I could more effectively work from home. To that end, I have…
Revisiting Two Old Friends: ArcGIS and PostGIS
Back in the dark old days of ArcSDE, when it first started to support PostgreSQL/PostGIS as a back-end data store, I did a series of posts about how to work with it. Of course, working with PostGIS in ArcGIS was a theme of the early days of this blog, through my association with zigGIS. Although it’s…
Extending Hibernate Spatial
Java is my “Groundhog Day” language. It’s one that I use just infrequently enough to feel like I’m starting over every time a new requirement pops up. As a result of planning the system migration I discussed in my last post, I’ve been doing some work with it, which is my first sustained Java work since…