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Elevation FAQs - 34 Found

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How can I download NED data in bulk?

 

Dataset

Minimum Delivery Packages

Format

Projection

Size Estimates (Zipped)

 

NED 2 Arc Second - Alaska

Complete Dataset

ArcGrid,

Gridfloat
or .IMG

Geographic

4.0 Gbytes 
4.0 Gbytes
4.0 Gbytes

 

NED 1 Arc Second

Complete Dataset

ArcGrid,

Gridfloat
or .IMG

Geographic

86.0 Gbytes
86.0 Gbytes
81.0 Gbytes



NED 1/3 Arc Second

Complete Dataset

ArcGrid,

Gridfloat
or .IMG

Geographic

327.0 Gbytes
334.0 Gbytes
308.0 Gbytes

 

NED 1/9 Arc Second

Complete Dataset

ArcGrid,
Gridfloat

or .IMG

Geographic

Not Available 
Not Available
632.0 Gbytes

 

NED Original Product

Resolution DEMs

Complete Dataset

and Individual State

ArcGridVaries114 Gbytes

1. To request NED bulk elevation data, please email tnminfo@usgs.gov and provide the following information:
 

  • Your contact information (address, phone number and email address).
  • Product(s) you are requesting.
  • Requested data format.

 

2. An email will be sent to you containing the following information:
 

  • Job ID Number.
  • Size estimates for requested data.
  • External drive minimum specifications.
  • Shipping address.

 

3. Once you receive the email you will then ship the following to USGS:
 

  • Correct number of external drives based on the estimated size of the data requested (specifications for hard drives are listed below).
  • A copy of all correspondence emails — please highlight the Job ID Number.
  • Return shipping address and phone number.
  • Return shipping account number (FEDEX only) or pre-paid shipping labels (UPS or FEDEX only). Sorry, we cannot ship USPS.

Specifications for external hard drives are as follows:
  • USB 2.0 compatible and higher.
  • PC compatible.
  • Capacity - large enough for estimated data, usually 30 to 40 gigabytes (GB) for system use. For example, a 300 GB external hard drive holds 277 GB of actual data; 500 GB external hard drives hold 460 gigabytes of actual data; 1TB external hard drives hold 930GB; 1.5 TB external hard drives hold 1386 GB; 2 TB hard drives hold 1860GB; 3 TB hard drives hold 2790 GB; and 4 TB hard drives hold 3725 GB.
  • Accepted capacity range of 8 GB to 4.0 Terabytes.
  • Cache Buffer – 8 megabytes or higher.
  • Spin Rate—7200 RPM (can be less but this is preferred).
  • Drives are reformatted to NTFS; any data already on the external hard drive will be lost. 

 

Please note:

  • We cannot process the request unless we have the correct number of drives; a Job ID Number listed, and pre-paid return shipping account or labels.
  • Data will be written to the drives in a compressed (.zip) format.
  • Turn-around times will depend on our current workload at the time an order is placed, but in most cases you will receive the data in 1 – 2 weeks.

 

Tags: Maps, Topographic, Data Products