ASCE 41-17 Web Service Documentation

This software is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The software has not received final approval by the U.S. Geological Survey (USGS). No warranty, expressed or implied, is made by the USGS or the U.S. Government as to the functionality of the software and related material nor shall the fact of release constitute any such warranty. The software is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the software.

Request Parameters

Required parameters

latitude
Latitude for location at which to compute composite results
Example: 34
longitude
Longitude for location at which to compute composite results
Example: -118
siteClass
NEHRP site classification
Example: C
customProbability
Target custom probability of exceedance in a 50 year return period as a decimal
Example: 0.10
Optional, if not specificed then service returns results for BSE-2N, BSE-1N, BSE-2E, BSE-1E instead

Output

Web service response

request
date
Timestamp
Example: “YYYY-MM-DDThh:mm:ssZ”
referenceDocument
Identifying the reference document for the returned data
Example: “ASCE41-17”
status
String ("success" or "error")
Example: “success”
url
URL to reproduce this result
Example: {MOUNT_PATH}/asce41-17.json?latitude=34&longitude=-118&siteClass=C”
parameters
latitude
Latitude for location at which to compute composite results
Example: 34
longitude
Longitude for location at which to compute composite results
Example: -118
siteClass
NEHRP site classification.
Example: “C”
customProbability
Target custom probability of exceedance in a 50 year return period as a decimal. Only included if user specified in request
Example: 0.10
spatialInterpolationMethod
Identifier for the interpolation method used to obtain data for location of interest from underlying gridded datasets
response
data
An array containing HazardLevel objects with varying properties based on different hazard level responses (BSE-2N, etc…).
metadata
s1MaxDirFactor
Factor applyed to the geometric mean ground motion to get max direction ground motion (1.0 s)
s1dPercentileFactor
Factor applyed to 50% ground motion to achieve target percentile ground motion (1.0 s)
s1dFloor
Minimum constraint placed on the deterministic ground motion (1.0 s)
ssMaxDirFactor
Factor applyed to the geometric mean ground motion to get max direction ground motion (0.2 s)
ssdPercentileFactor
Factor applyed to 50% ground motion to achieve target percentile ground motion (0.2 s)
ssdFloor
Minimum constraint placed on the deterministic ground motion (0.2 s)

Hazard Level Object Definitions

BSE-2N
hazardLevel
Label describing this hazard level object.
“BSE-2N”
ssuh
max direction uniform hazard (0.2 s)
crs
coefficient of risk (0.2 s)
ssrt
risk-targeted hazard (0.2 s)
ssd
deterministic hazard (0.2 s)
ss
spectral response (0.2 s)
fa
site amplification factor (0.2 s)
sxs
site-modified spectral response (0.2 s)
s1uh
max direction uniform hazard (1.0 s)
cr1
coefficient of risk (1.0 s)
s1rt
risk-targeted hazard (1.0 s)
s1d
deterministic hazard (1.0 s)
s1
spectral response (1.0 s)
fv
site amplification factor (1.0 s)
sx1
site-modified spectral response (1.0 s)
horizontalSpectrum
Discrete horizontal response spectrum.
BSE-1N
hazardLevel
Label describing this hazard level object.
“BSE-1N”
sxs
site-modified spectral response (0.2 s)
sx1
site-modified spectral response (1.0 s)
horizontalSpectrum
Discrete horizontal response spectrum.
BSE-2E
hazardLevel
Label describing this hazard level object.
“BSE-2E”
ss
spectral response (0.2 s)
fa
site amplification factor (0.2 s)
sxs
site-modified spectral response (0.2 s)
s1
spectral response (1.0 s)
fv
site amplification factor (1.0 s)
sx1
site-modified spectral response (1.0 s)
horizontalSpectrum
Discrete horizontal response spectrum.
BSE-1E
hazardLevel
Label describing this hazard level object.
“BSE-1E”
ss
spectral response (0.2 s)
fa
site amplification factor (0.2 s)
sxs
site-modified spectral response (0.2 s)
s1
spectral response (1.0 s)
fv
site amplification factor (1.0 s)
sx1
site-modified spectral response (1.0 s)
horizontalSpectrum
Discrete horizontal response spectrum.
T-Sub-L Data
t-sub-l
Long-period transition period in seconds
Custom
hazardLevel
Label describing this hazard level object.
“Custom”
customProbability
Decimal probability of exceedance in 50 years for target ground motion.
ss
spectral response (0.2 s)
fa
site amplification factor (0.2 s)
sxs
site-modified spectral response (0.2 s)
s1
spectral response (1.0 s)
fv
site amplification factor (1.0 s)
sx1
site-modified spectral response (1.0 s)
horizontalSpectrum
Discrete horizontal response spectrum.

Example

Request

/asce41-17.json?latitude=34&longitude=-118&siteClass=C

Response

{
  "request": {
    "date": "2017-09-20T17:49:52.880Z",
    "referenceDocument": "ASCE41-17",
    "status": "success",
    "url": "http://localhost/ws/designmaps/asce41-17.json?latitude=34&longitude=-118&siteClass=C",
    "parameters": {
      "latitude": 34,
      "longitude": -118,
      "siteClass": "C"
    }
  },
  "response": {
    "data": [
      {
        "hazardLevel": "BSE-2N",
        "ssuh": 2.106,
        "crs": 0.896,
        "ssrt": 1.888,
        "ssd": 2.432,
        "ss": 1.888,
        "fa": 1.2,
        "sxs": 2.265,
        "s1uh": 0.743,
        "cr1": 0.9,
        "s1rt": 0.669,
        "s1d": 0.963,
        "s1": 0.669,
        "fv": 1.4,
        "sx1": 0.936,
        "horizontalSpectrum": [
          [
            0,
            0.906
          ],
          [
            0.025,
            1.317
          ],
          [
            0.05,
            1.728
          ],
          [
            0.083,
            2.265
          ],
          [
            0.1,
            2.265
          ],
          [
            0.15,
            2.265
          ],
          [
            0.2,
            2.265
          ],
          [
            0.25,
            2.265
          ],
          [
            0.3,
            2.265
          ],
          [
            0.35,
            2.265
          ],
          [
            0.4,
            2.265
          ],
          [
            0.413,
            2.265
          ],
          [
            0.45,
            2.08
          ],
          [
            0.5,
            1.872
          ],
          [
            0.55,
            1.702
          ],
          [
            0.6,
            1.56
          ],
          [
            0.65,
            1.44
          ],
          [
            0.7,
            1.337
          ],
          [
            0.75,
            1.248
          ],
          [
            0.8,
            1.17
          ],
          [
            0.85,
            1.101
          ],
          [
            0.9,
            1.04
          ],
          [
            0.95,
            0.985
          ],
          [
            1,
            0.936
          ],
          [
            1.05,
            0.892
          ],
          [
            1.1,
            0.851
          ],
          [
            1.15,
            0.814
          ],
          [
            1.2,
            0.78
          ],
          [
            1.25,
            0.749
          ],
          [
            1.3,
            0.72
          ],
          [
            1.35,
            0.693
          ],
          [
            1.4,
            0.669
          ],
          [
            1.45,
            0.646
          ],
          [
            1.5,
            0.624
          ],
          [
            1.55,
            0.604
          ],
          [
            1.6,
            0.585
          ],
          [
            1.65,
            0.567
          ],
          [
            1.7,
            0.551
          ],
          [
            1.75,
            0.535
          ],
          [
            1.8,
            0.52
          ],
          [
            1.85,
            0.506
          ],
          [
            1.9,
            0.493
          ],
          [
            1.95,
            0.48
          ],
          [
            2,
            0.468
          ],
          [
            2.05,
            0.457
          ],
          [
            2.1,
            0.446
          ],
          [
            2.15,
            0.435
          ],
          [
            2.2,
            0.426
          ],
          [
            2.25,
            0.416
          ],
          [
            2.3,
            0.407
          ],
          [
            2.35,
            0.398
          ],
          [
            2.4,
            0.39
          ],
          [
            2.45,
            0.382
          ],
          [
            2.5,
            0.374
          ],
          [
            2.55,
            0.367
          ],
          [
            2.6,
            0.36
          ],
          [
            2.65,
            0.353
          ],
          [
            2.7,
            0.347
          ],
          [
            2.75,
            0.34
          ],
          [
            2.8,
            0.334
          ],
          [
            2.85,
            0.328
          ],
          [
            2.9,
            0.323
          ],
          [
            2.95,
            0.317
          ],
          [
            3,
            0.312
          ],
          [
            3.05,
            0.307
          ],
          [
            3.1,
            0.302
          ],
          [
            3.15,
            0.297
          ],
          [
            3.2,
            0.293
          ],
          [
            3.25,
            0.288
          ],
          [
            3.3,
            0.284
          ],
          [
            3.35,
            0.279
          ],
          [
            3.4,
            0.275
          ],
          [
            3.45,
            0.271
          ],
          [
            3.5,
            0.267
          ],
          [
            3.55,
            0.264
          ],
          [
            3.6,
            0.26
          ],
          [
            3.65,
            0.256
          ],
          [
            3.7,
            0.253
          ],
          [
            3.75,
            0.25
          ],
          [
            3.8,
            0.246
          ],
          [
            3.85,
            0.243
          ],
          [
            3.9,
            0.24
          ],
          [
            3.95,
            0.237
          ],
          [
            4,
            0.234
          ],
          [
            4.05,
            0.231
          ],
          [
            4.1,
            0.228
          ],
          [
            4.15,
            0.226
          ],
          [
            4.2,
            0.223
          ],
          [
            4.25,
            0.22
          ],
          [
            4.3,
            0.218
          ],
          [
            4.35,
            0.215
          ],
          [
            4.4,
            0.213
          ],
          [
            4.45,
            0.21
          ],
          [
            4.5,
            0.208
          ],
          [
            4.55,
            0.206
          ],
          [
            4.6,
            0.204
          ],
          [
            4.65,
            0.201
          ],
          [
            4.7,
            0.199
          ],
          [
            4.75,
            0.197
          ],
          [
            4.8,
            0.195
          ],
          [
            4.85,
            0.193
          ],
          [
            4.9,
            0.191
          ],
          [
            4.95,
            0.189
          ],
          [
            5,
            0.187
          ],
          [
            5.05,
            0.185
          ],
          [
            5.1,
            0.184
          ],
          [
            5.15,
            0.182
          ],
          [
            5.2,
            0.18
          ],
          [
            5.25,
            0.178
          ],
          [
            5.3,
            0.177
          ],
          [
            5.35,
            0.175
          ],
          [
            5.4,
            0.173
          ],
          [
            5.45,
            0.172
          ],
          [
            5.5,
            0.17
          ],
          [
            5.55,
            0.169
          ],
          [
            5.6,
            0.167
          ],
          [
            5.65,
            0.166
          ],
          [
            5.7,
            0.164
          ],
          [
            5.75,
            0.163
          ],
          [
            5.8,
            0.161
          ],
          [
            5.85,
            0.16
          ],
          [
            5.9,
            0.159
          ],
          [
            5.95,
            0.157
          ],
          [
            6,
            0.156
          ],
          [
            6.05,
            0.155
          ],
          [
            6.1,
            0.153
          ],
          [
            6.15,
            0.152
          ],
          [
            6.2,
            0.151
          ],
          [
            6.25,
            0.15
          ],
          [
            6.3,
            0.149
          ],
          [
            6.35,
            0.147
          ],
          [
            6.4,
            0.146
          ],
          [
            6.45,
            0.145
          ],
          [
            6.5,
            0.144
          ],
          [
            6.55,
            0.143
          ],
          [
            6.6,
            0.142
          ],
          [
            6.65,
            0.141
          ],
          [
            6.7,
            0.14
          ],
          [
            6.75,
            0.139
          ],
          [
            6.8,
            0.138
          ],
          [
            6.85,
            0.137
          ],
          [
            6.9,
            0.136
          ],
          [
            6.95,
            0.135
          ],
          [
            7,
            0.134
          ],
          [
            7.05,
            0.133
          ],
          [
            7.1,
            0.132
          ],
          [
            7.15,
            0.131
          ],
          [
            7.2,
            0.13
          ],
          [
            7.25,
            0.129
          ],
          [
            7.3,
            0.128
          ],
          [
            7.35,
            0.127
          ],
          [
            7.4,
            0.127
          ],
          [
            7.45,
            0.126
          ],
          [
            7.5,
            0.125
          ],
          [
            7.55,
            0.124
          ],
          [
            7.6,
            0.123
          ],
          [
            7.65,
            0.122
          ],
          [
            7.7,
            0.122
          ],
          [
            7.75,
            0.121
          ],
          [
            7.8,
            0.12
          ],
          [
            7.85,
            0.119
          ],
          [
            7.9,
            0.119
          ],
          [
            7.95,
            0.118
          ],
          [
            8,
            0.117
          ],
          [
            8.05,
            0.116
          ],
          [
            8.1,
            0.114
          ],
          [
            8.15,
            0.113
          ],
          [
            8.2,
            0.111
          ],
          [
            8.25,
            0.11
          ],
          [
            8.3,
            0.109
          ],
          [
            8.35,
            0.107
          ],
          [
            8.4,
            0.106
          ],
          [
            8.45,
            0.105
          ],
          [
            8.5,
            0.104
          ],
          [
            8.55,
            0.102
          ],
          [
            8.6,
            0.101
          ],
          [
            8.65,
            0.1
          ],
          [
            8.7,
            0.099
          ],
          [
            8.75,
            0.098
          ],
          [
            8.8,
            0.097
          ],
          [
            8.85,
            0.096
          ],
          [
            8.9,
            0.095
          ],
          [
            8.95,
            0.093
          ],
          [
            9,
            0.092
          ]
        ]
      },
      {
        "hazardLevel": "BSE-1N",
        "sxs": 1.51,
        "sx1": 0.624,
        "horizontalSpectrum": [
          [
            0,
            0.604
          ],
          [
            0.017,
            0.878
          ],
          [
            0.033,
            1.152
          ],
          [
            0.055,
            1.51
          ],
          [
            0.067,
            1.51
          ],
          [
            0.1,
            1.51
          ],
          [
            0.133,
            1.51
          ],
          [
            0.167,
            1.51
          ],
          [
            0.2,
            1.51
          ],
          [
            0.233,
            1.51
          ],
          [
            0.267,
            1.51
          ],
          [
            0.276,
            1.51
          ],
          [
            0.3,
            1.387
          ],
          [
            0.333,
            1.248
          ],
          [
            0.367,
            1.135
          ],
          [
            0.4,
            1.04
          ],
          [
            0.433,
            0.96
          ],
          [
            0.467,
            0.892
          ],
          [
            0.5,
            0.832
          ],
          [
            0.533,
            0.78
          ],
          [
            0.567,
            0.734
          ],
          [
            0.6,
            0.693
          ],
          [
            0.633,
            0.657
          ],
          [
            0.667,
            0.624
          ],
          [
            0.7,
            0.594
          ],
          [
            0.733,
            0.567
          ],
          [
            0.767,
            0.543
          ],
          [
            0.8,
            0.52
          ],
          [
            0.833,
            0.499
          ],
          [
            0.867,
            0.48
          ],
          [
            0.9,
            0.462
          ],
          [
            0.933,
            0.446
          ],
          [
            0.967,
            0.43
          ],
          [
            1,
            0.416
          ],
          [
            1.033,
            0.403
          ],
          [
            1.067,
            0.39
          ],
          [
            1.1,
            0.378
          ],
          [
            1.133,
            0.367
          ],
          [
            1.167,
            0.357
          ],
          [
            1.2,
            0.347
          ],
          [
            1.233,
            0.337
          ],
          [
            1.267,
            0.328
          ],
          [
            1.3,
            0.32
          ],
          [
            1.333,
            0.312
          ],
          [
            1.367,
            0.304
          ],
          [
            1.4,
            0.297
          ],
          [
            1.433,
            0.29
          ],
          [
            1.467,
            0.284
          ],
          [
            1.5,
            0.277
          ],
          [
            1.533,
            0.271
          ],
          [
            1.567,
            0.266
          ],
          [
            1.6,
            0.26
          ],
          [
            1.633,
            0.255
          ],
          [
            1.667,
            0.25
          ],
          [
            1.7,
            0.245
          ],
          [
            1.733,
            0.24
          ],
          [
            1.767,
            0.236
          ],
          [
            1.8,
            0.231
          ],
          [
            1.833,
            0.227
          ],
          [
            1.867,
            0.223
          ],
          [
            1.9,
            0.219
          ],
          [
            1.933,
            0.215
          ],
          [
            1.967,
            0.212
          ],
          [
            2,
            0.208
          ],
          [
            2.033,
            0.205
          ],
          [
            2.067,
            0.201
          ],
          [
            2.1,
            0.198
          ],
          [
            2.133,
            0.195
          ],
          [
            2.167,
            0.192
          ],
          [
            2.2,
            0.189
          ],
          [
            2.233,
            0.186
          ],
          [
            2.267,
            0.184
          ],
          [
            2.3,
            0.181
          ],
          [
            2.333,
            0.178
          ],
          [
            2.367,
            0.176
          ],
          [
            2.4,
            0.173
          ],
          [
            2.433,
            0.171
          ],
          [
            2.467,
            0.169
          ],
          [
            2.5,
            0.166
          ],
          [
            2.533,
            0.164
          ],
          [
            2.567,
            0.162
          ],
          [
            2.6,
            0.16
          ],
          [
            2.633,
            0.158
          ],
          [
            2.667,
            0.156
          ],
          [
            2.7,
            0.154
          ],
          [
            2.733,
            0.152
          ],
          [
            2.767,
            0.15
          ],
          [
            2.8,
            0.149
          ],
          [
            2.833,
            0.147
          ],
          [
            2.867,
            0.145
          ],
          [
            2.9,
            0.143
          ],
          [
            2.933,
            0.142
          ],
          [
            2.967,
            0.14
          ],
          [
            3,
            0.139
          ],
          [
            3.033,
            0.137
          ],
          [
            3.067,
            0.136
          ],
          [
            3.1,
            0.134
          ],
          [
            3.133,
            0.133
          ],
          [
            3.167,
            0.131
          ],
          [
            3.2,
            0.13
          ],
          [
            3.233,
            0.129
          ],
          [
            3.267,
            0.127
          ],
          [
            3.3,
            0.126
          ],
          [
            3.333,
            0.125
          ],
          [
            3.367,
            0.124
          ],
          [
            3.4,
            0.122
          ],
          [
            3.433,
            0.121
          ],
          [
            3.467,
            0.12
          ],
          [
            3.5,
            0.119
          ],
          [
            3.533,
            0.118
          ],
          [
            3.567,
            0.117
          ],
          [
            3.6,
            0.116
          ],
          [
            3.633,
            0.115
          ],
          [
            3.667,
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        "hazardLevel": "T-Sub-L Data",
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      "modelVersion": "v4.0.x",
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}