Latest Contributions by JosephElfelt1

I have posted about this before but I am sharing this again since there is some new  info that can help people find ArcGIS data. The PDF I curate is at https://mappingsupport.com/p/surf_gis/list-federal-state-county-city-GIS-servers.pdf Once a week my code scans each address and any bad links are either fixed or flagged.  An updated list is usually posted each Wednesday. The new info is that another developer is building a tool that lets you search these servers based on a keyword.  See https://blog.gisdata.io/   ... View more

This entry says is is data from Suomi-NPP satellite. https://www.arcgis.com/home/item.html?id=363c856090d7402b971d620c0126382b This entry says it is data from the NOAA-20 satellite. https://www.arcgis.com/home/item.html?id=c873f4c13aa54b25b01270df9358dc64 Both entries point to https://modis.arcgis.com/arcgis/rest/services/VIIRS/ImageServer Seems like there should be two different ImageServer resources.  ... View more

I am a software developer who has been producing maps that display GIS data using: 1. Leaflet map API 2. ESRI Leaflet plugin 3. My own javascript Acting as a volunteer, I produce maps related to disasters (particularly wildland fires) and post them on social media. Currently I have a free ESRI developer account. However, I have been informed by an ESRI rep that this type of account is not supposed to display tile layers that ESRI owns which are part of ArcGIS Online. For example, my map has been displaying this ESRI tile layer which consists of scans of the old paper USGS topo maps. https://services.arcgisonline.com/ArcGIS/rest/services/USA_Topo_Maps/MapServer I have 2 questions: 1. If I buy the ArcGIS Online Individual license will that entitled me to produce maps that display tile layers that ESRI owns which are part of ArcGIS Online? 2. Does an ArcGIS Online Individual license have a rate limit? For example, the free developer account has a limit of 1,000,000 million basemap tiles per month. The fire map I produce is popular and in March my developer account exceeded that limit by about 10%. Joseph Elfelt Redmond, WA https://mappingsupport.com @mappingsupport ... View more

The Living Atlas has an entry called “USA Topo Maps” at:  https://www.arcgis.com/home/item.html?id=99cd5fbd98934028802b4f797c4b1732 This is a tile layer that displays the ‘historical’ USGS topographic maps. ESRI owns this tile layer. The information for this tile layer includes a link to a “summary” of the terms of use. That summary document has two sections: “IF YOU HAVE AN ARCGIS SUBSCRIPTION YOU MAY ..... IF YOU HAVE A DEVELOPER SUBSCRIPTION Refer to the ArcGIS Developer FAQ” I have an ESRI ‘developer’ account. The ESRI Developer FAQ is at https://developers.arcgis.com/faq/ That FAQ is silent on the question of whether a ‘developer’ account can display tile layers listed in the Living Atlas and owned by ESRI. 1. Can anyone shed light? 2. I am requesting that ESRI update its ‘developer’ FAQ to specifically address this issue. ... View more

This post is more of an answer than a question. Hope that’s OK. A few years ago I was surprised to discover that there was not a list of federal ArcGIS server addresses. So I started making such a list to help with my Leaflet mapping projects. Sure enough, that work expanded and the list now includes state, county and local ArcGIS server addresses. Note that this list focuses on server addresses, not portals. Each address is scanned by my code once per week and any dead links are fixed or flagged. An updated list is usually posted each week. Here is the ArcGIS server list as a pdf file: https://mappingsupport.com/p/surf_gis/list-federal-state-county-city-GIS-servers.pdf And here is a csv file that you can use to import the server addresses into other tools. A description of the fields in the csv file is on page 2 of the pdf file. https://mappingsupport.com/p/surf_gis/list-federal-state-county-city-GIS-servers.csv Another one of my *volunteer* projects that some might find useful is GISsurfer. This is a web map based on the Leaflet map API that lets the user (1) ‘surf’ GIS layers on any public-facing (i.e. no login needed) ArcGIS server and (2) produce maps to display ArcGIS layers. GISsurfer website: https://gissurfer.com ... View more

Here is an ESRI presentation promoting progressive web apps (PWA). https://www.esri.com/content/dam/esrisites/en-us/about/events/media/2019-european-developers-summit/eurodev-09.pdf By definition, a PWA can work offline since the files can be cached on the user's device.  And anyone with the link to the main page for the PWA will be able to open it and cache the files, including basemap tiles, on their device and do so without making any calls to ESRI's servers. On the other hand, ESRI's TOS seems to indicate that allowing anyone to use portions of ESRI's basemaps offline as I have described is not allowed. Can anyone shed light? ... View more

I am trying to use dynamic layers to restyle some data from the USA national map server.  Here is a tile call without dynamic layers.  This call works fine. https://carto.nationalmap.gov/arcgis/rest/services/transportation/MapServer/export?bbox=-13524806.003293231,6001415.0572964735,-13515022.063672727,5998242.9206226375&size=512,512&dpi=96&format=png24&transparent=true&bboxSR=3857&imageSR=3857&layers=show:34&f=image And here is the same call with dynamic layers.  The server responds "Bad request". https://carto.nationalmap.gov/arcgis/rest/services/transportation/MapServer/export?bbox=-13524806.003293231,6001415.0572964735,-13515022.063672727,5998242.9206226375&size=512,512&dpi=96&format=png24&transparent=true&bboxSR=3857&imageSR=3857&dynamicLayers=[{'source':{'type':'mapLayer','mapLayerId':34},'drawingInfo':{'renderer':{'type':'simple','symbol':{'type':'esriSLS','style':'esriSLSSolid','color':[0,255,0,255],'width':5}}}}]&layers=show:34&f=image Is it me? Is it the server? Can anyone shed light?     ... View more