maphew’s gists

maphew / arcpy_parse_path.py

Created January 17, 2018 21:29

partial helper for reliably deriving workspace path from input Feature Class path

	def parse_path(fc_path):
	'''Derive workspace from Feature Class's location

	Adapted from http://pro.arcgis.com/en/pro-app/tool-reference/modelbuilder-toolbox/parse-path.htm'''
	fc = os.path.basename(fc_path)
	dir = os.path.dirname(fc_path)
	name = os.path.basename(fc_path).rstrip(os.path.splitext(fc_path)[1])
	ext = os.path.splitext(fc_path)[1].lstrip(".")

	if ext.lower() == 'gdb':

maphew / classify-ground-export-aboveground.json

Last active January 11, 2020 22:11

A PDAL pipeline that a) classifies into ground/not-ground, b) adds "Height Above Ground" attribute, and c) exports only above ground points. Adapted from https://lists.osgeo.org/pipermail/pdal/2017-July/001367.html

	{
	"pipeline": [
	"Carmacks_01.laz",
	{
	"type": "filters.assign",
	"assignment": "Classification[:]=0"
	},
	{
	"type": "filters.smrf"
	},

maphew / ANUDEM-references.txt

Created November 7, 2017 23:11

	# REFERENCES

	Bolstad, P.V. and Stowe, T. 1994. An evaluation of DEM accuracy: elevation, slope and aspect.
	Photogrammetric Engineering and Remote Sensing 60: 1327-1332.

	Garbrecht, J. and Starks, P. 1995. Note on the use of USGS level 1 7.5-minute DEM coverages for landscape drainage analyses.
	Photogrammetric Engineering and Remote Sensing 61: 519-522.

	Giles, P.T. and Franklin, S.E. 1996. Comparison of derivative topographic surfaces of a DEM generated from stereographic SPOT images with field measurements.
	Photogrammetric Engineering and Remote Sensing 62: 1165-1171.

maphew / fetch-renderer.py

Last active October 26, 2017 22:33

How to change or assign ArcMap layer symbology type from python?

	#Interactive Python window in ArcMap
	import arcpy
	mxd = arcpy.mapping.MapDocument("CURRENT")
	df = arcpy.mapping.ListDataFrames(mxd, "Layers")[0]
	lyr = arcpy.mapping.ListLayers(mxd, "*", df)[0]
	renderer = lyr._arc_object.renderer

	>>> renderer
	u"<Renderer xsi:type='typens:RasterClassifyRenderer' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'
	...snip...

maphew / asc2json.ps1

Last active October 18, 2017 20:41

Convert Arcinfo Ascii Grid file to JSON

	# asc2json
	# Convert Arcinfo Ascii Grid file to JSON
	# RegEx replace:
	# - strip leading whitespace
	# - strip line not beginning with a number
	# - add opening `[` to beginning of line
	# - space to comma
	# - end of line to `],`
	# - strip empty list `[],`

maphew / esri-register-dll.bat

Created October 10, 2017 22:08

Manually register/unregister Esri COM tool DLLs (https://gis.stackexchange.com/questions/4129/how-to-register-dll-extension-with-esriregasm-exe

	@echo off
	echo.
	echo. Manually registering custom ArcGIS COM tools in the current folder...
	echo.
	setlocal
	set PATH=%PATH%;C:\Program Files (x86)\Common Files\ArcGIS\bin;C:\Program Files\Common Files\ArcGIS\bin

	for %%a in (*.dll) do ESRIRegAsm.exe "%%~dpna"

	endlocal

maphew / points-with-names.geojson

Created June 27, 2017 20:46

A few geojson points with a 'Name' attribute to use for labelling

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maphew / qgis-vector-polygonize-output.geojson

Last active June 27, 2017 19:18

How to create polygons from this geojson grid, using pure javascript or tools available to Node.js? From https://gis.stackexchange.com/questions/245277/how-to-create-geojson-polygons-from-lines

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maphew / yt-nts250k.geojson

Created June 22, 2017 22:38

Source: http://ftp.geogratis.gc.ca/pub/nrcan_rncan/vector/canvec/fgdb/Admin/, converted to geojson with https://mygeodata.cloud

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maphew / yt-meteo.html

Created December 7, 2016 02:56

Meteo Earth, centred over the Yukon Territory

	<script type='text/javascript' src='http://www.meteoearth.com/service/me.js'></script>
	<div id='meDiv' style='width:420px;height:420px;background:#000;position:relative'></div>
	<script type='text/javascript'>var meConfig={div:document.getElementById('meDiv'),viewSettings:{longitude: -132.8662,latitude: 65.7642,zoom:8.3868,is3DEnabled:true,isLightingEnabled:true, isPrecipitationEnabled:true, isWindEnabled:true}};me_createView(meConfig);</script>

matt wilkie maphew