Keith Jenkins kgjenkins

uMap workshop

Feb 24, 2021
by Keith Jenkins, GIS Librarian at Mann Library, Cornell University

uMap lets you create you own interactive maps by adding points, lines, and polygons manually or by importing existing geospatial data sources. It offers a wide variety of basemaps, and allows you to customize how your data appears on the map, and how users will interact with it. Maps and the underlying data can be easily shared and embedded in external websites like a Wordpress site.

uMap website: https://umap.openstreetmap.fr/en/

uMap is built by members of the OpenStreetMap (OSM) community, but it is a separate project. Many of the basemaps available in uMap are derived from OSM data. Any data you add to a map in uMap remains separate from the data in OSM.

Working with GFED data in QGIS

GFED (Global Fire Emissions Database) data is distributed in HDF5 format, which is commonly used for multidimensional datasets, but can sometimes be a challenge to use in QGIS for a variety of reasons. First, it doesn't have an explicitly-defined CRS that QGIS can simply use to display the data in the correct location. Second, there are many different subdatasets packed into a single GFED .hdf5 file, representing different variables, units, and time periods.

This was created in QGIS... details coming soon!

The following Python code will, every 30 seconds, automatically update the data from the source for any QGIS layer with 'autoUpdate' in the layer name. Each time it updates, it will put the timestamp in the layer name, although you could leave that part out.

This is particularly useful for remote data sources like json-over-http or even local CSV files that might be changed by another program while the QGIS project is open.

Just paste the code into the QGIS Python console.

import threading
import datetime

ARCH 5115 - QGIS Workshop, Day 2

The QGIS workshop folder on Box has been updated, so please download the entire "QGIS-workshops" folder to your computer.

Unzip the files
Double-click the workshop2.qgz project to open it in QGIS (or else open it from within QGIS)

Elevation raster data

ARCH 5115 - QGIS Workshop, Day 1

Workshop 2020-09-09 by Keith Jenkins, GIS Librarian at Mann Library

For help after this workshop, contact me at [email protected]
Or set up a Zoom appointment at https://guides.library.cornell.edu/gis/help

Data for this workshop is located in the "QGIS-workshops" folder on Box

	<html>
	<head>
	<title>Cornell Theses and Dissertations by Academic Discipline</title>
	<meta http-equiv='Content-type' content='text/html; charset=UTF-8'>
	<meta name='author' content='Keith Jenkins'>
	<meta name='dateModified' content='2022-01-11'>
	<style>
	body { font-family: sans-serif }
	h1 { text-align:center ; background: #b31b1b ; color: #fff ; padding: 0.5em ; margin: 0 }
	td { white-space: nowrap }

	<!-- Stamen Watercolor tiles framed in an HTML table with some CSS style effects -->
	<!-- created for Day 14 of the 2021 #30DayMapChallenge -->
	<html>
	<head>
	<style>
	img { width:128px ; height:128px }
	table { border-spacing: 12px }
	td { border:12px ridge #ccc }
	</style>
	</head>

	<?xml version="1.0"?>
	<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
	<xsl:output method="html" indent="yes"
	doctype-public="-//W3C//DTD XHTML 1.0 Strict//EN"
	doctype-system="http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"
	omit-xml-declaration="yes"/>
	<!--

	A simple XSL stylesheet for displaying FGDC metadata as HTML

	<html>
	<head>
	</head>
	<body>

	<canvas id='canvas' width=960 height=500></canvas>

	<script>
	var c = canvas.getContext('2d');