Downloading Maps with The National Map Download Client

Downloading Maps with The National Map Download Client


Downloading Maps with The National Map Download
Client In this lesson, we will discuss the process
of using the National Map download client to download maps. Lesson 4a provided some
general guidance on use of the interface and available tools. If necessary, please review
lesson 4a for information on the general use of the client’s features. Here we are at the launch page for the National
Map data download and visualization services. If you haven’t already, please bookmark
this address now for future reference. This lesson focuses on The National Map Download
Client and how the client can be used to download maps. The preferred method of accessing the
client for downloading maps is clicking the Download Maps link under Maps. This will open
the client already configured specifically for accessing maps. Clicking the link under
applications would open the default version of the client.
We will select Download Maps, which will open the Download Client in a new browser tab or
window. The National Map Download Client is a new
web application built on modern web technologies to take advantage of the USGS staged-product
download API and provide users with a more straight-forward, and feature-rich download
experience. Using The National Map Download Client for
downloading maps is basically a two stage process. You will first define an area of
interest, then select the products available in that location. As you can see, we have
two map options. The first is the US Topo, which is the most current image based topographic
map. Historical topographic maps are also available, which are scans of the traditional
paper or lithographic printed maps. We will start the process of finding our maps
by defining an area of interest. This can be done using the draw point tool, where you
place a marker at a specific location on the map or by using the draw rectangle tool. Use
the draw rectangle tool with caution as it may produce an unmanageable number of results. After zooming in to an area of interest select
the Draw Point tool to place a marker at the location of interest.  This will immediately
query and display the results under a new products tab.  Using the draw rectangle box
will result in the same products tab automatically showing. This behavior is unique to this custom
view of the client specific to maps. In other custom views, you would not see this same
behavior. If both US Topo and Historical Topographic
Maps datasets were selected, the results will be collapsed to easily see how many results
were available for each dataset. To uncollapse and see the actual products
click on each of the ‘results’ links.  If only one dataset was selected the results
will not be initially collapsed. Each product result will include the product
title, the published date, the last date the metadata was updated along with the format
and size of the downloaded product and extent. A number of Action links can be found next
to each product to draw the footprint on the map, zoom to the product extent on the map,
and obtain additional Info or Metadata about the product. You can also directly download
each product in the list by clicking on the download button. You can also go to the USGS
Map Store to order a printed copy. Clicking the show footprints at the top of
the list shows them all for the current list. Once you draw a footprint, you can click the
same link again to remove the footprints. The Cart buttons can be used to add or remove
maps to or from the Cart. The Add All button can be used to add all the currently visible
products to the Cart without having to click each individual item. The View Cart button
will create a Cart tab which shows a list of the items already added to the Cart. The Cart is a temporary list of products you’ve
selected within the current session. These are not automatically saved when you close
the browser or select the start over button. Enough information is given to identify the
products along with Metadata and Download links. Items can be Removed from the cart
individually with the Remove button or the entire cart can be emptied by selecting the
Remove All button. To save the contents of the cart to a CSV
file click the “list and export cart items” button, and you’re your download will be
initiated. The CSV file can also be read easily into
Microsoft Excel, LibreOffice, or any other spreadsheet program that reads CSV files,
in addition to being used to import the products into the National Map Download Manager. A link to the download manager is provided
for convenience on the Cart page. We will describe the Download Manager and
its use in another lesson. In this lesson we introduced the process of
using the National Map Download Client to download maps. This concludes lesson 4c, to continue to the
next lesson, please return to the course homepage.

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