How to use WMTS from David Rumsey map service

hjespersenhjespersen Global Mapper UserPosts: 16
Hi. I would like to access some of the geo-referenced maps provided by David Rumsey, http://www.davidrumsey.com/, a great resource for historical maps. The first map I tried provided a WMTS URL, http://maps.georeferencer.com/georeferences/713457468785/2017-02-20T14:25:19.132722Z/wmts?key=srAaWmpJRiaUfNeRQyGg&SERVICE=WMTS&REQUEST=GetCapabilities

(This particular map is at http://davidrumsey.georeferencer.com/maps/713457468785/.)

My first problem is that the Global Mapper help interface does not provide useful search results about WMTS. So I guessed that I should select Connect to Online Data and press the Add New Source button. There, I selected WMTS and entered the URL. I pressed the Get List of Available Data Layers button and received the following error message:

Some data may be missing.
expected end of tag 'meta'

Can anyone help me figure this out? Thanks.

Answers

  • bmg_mikebmg_mike Global Mapper Guru Posts: 173Trusted User
    I'm taking a look at this. I can reproduce what you are seeing in Global Mapper. What is odd is that when I open your URL above in a web browser I get back the expected WMTS XML GetCapabilities information. When I try and pull the same URL in Global Mapper however I get back a web page that starts off like below:

    Images to interactive maps

    Georeferencer is an online tool that assigns
    geographical location to any image.

    Home banner georeferencer

    How does it work?

    Upload

    1. Upload

    ----------

    It's almost like the server is responding differently based on who is asking. Is that something that may be happening?

    If not, I'm going to keep investigating with a packet sniffer to see if there is something I am missing.

    Thanks,

    Mike
    Global Mapper Guru
    geohelp@bluemarblegeo.com
    http://www.bluemarblegeo.com/
  • bmg_mikebmg_mike Global Mapper Guru Posts: 173Trusted User
    I took a look and found that the map server provided the correct response only if the parameters were in the exact order originally specified. Global Mapper was parsing and re-ordering the parameters, which in theory should have no effect but in this case does.

    I have updated GM to keep any explicit parameters in the original order, then adding any additional ones (if any) to the end. This fixes the problems. I have placed a new build with the fix at http://data.bluemarblegeo.com/downloads/global-mapper/dailybuilds/ for you to try.

    Thanks,

    Mike
    Global Mapper Guru
    geohelp@bluemarblegeo.com
    http://www.bluemarblegeo.com/
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