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.
- TL Data
-
- tl
- Long-period transition period in seconds
- t-sub-l data
-
- t-sub-l
- DEPRECATED
- 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:"2019-05-28T16:34:01.172Z",
referenceDocument:"ASCE41-17",
status:"success",
url:"http://localhost:8000/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
],
[
0.025,
0.878
],
[
0.05,
1.152
],
[
0.083,
1.51
],
[
0.1,
1.51
],
[
0.15,
1.51
],
[
0.2,
1.51
],
[
0.25,
1.51
],
[
0.3,
1.51
],
[
0.35,
1.51
],
[
0.4,
1.51
],
[
0.413,
1.51
],
[
0.45,
1.387
],
[
0.5,
1.248
],
[
0.55,
1.135
],
[
0.6,
1.04
],
[
0.65,
0.96
],
[
0.7,
0.892
],
[
0.75,
0.832
],
[
0.8,
0.78
],
[
0.85,
0.734
],
[
0.9,
0.693
],
[
0.95,
0.657
],
[
1,
0.624
],
[
1.05,
0.594
],
[
1.1,
0.567
],
[
1.15,
0.543
],
[
1.2,
0.52
],
[
1.25,
0.499
],
[
1.3,
0.48
],
[
1.35,
0.462
],
[
1.4,
0.446
],
[
1.45,
0.43
],
[
1.5,
0.416
],
[
1.55,
0.403
],
[
1.6,
0.39
],
[
1.65,
0.378
],
[
1.7,
0.367
],
[
1.75,
0.357
],
[
1.8,
0.347
],
[
1.85,
0.337
],
[
1.9,
0.328
],
[
1.95,
0.32
],
[
2,
0.312
],
[
2.05,
0.304
],
[
2.1,
0.297
],
[
2.15,
0.29
],
[
2.2,
0.284
],
[
2.25,
0.277
],
[
2.3,
0.271
],
[
2.35,
0.266
],
[
2.4,
0.26
],
[
2.45,
0.255
],
[
2.5,
0.25
],
[
2.55,
0.245
],
[
2.6,
0.24
],
[
2.65,
0.236
],
[
2.7,
0.231
],
[
2.75,
0.227
],
[
2.8,
0.223
],
[
2.85,
0.219
],
[
2.9,
0.215
],
[
2.95,
0.212
],
[
3,
0.208
],
[
3.05,
0.205
],
[
3.1,
0.201
],
[
3.15,
0.198
],
[
3.2,
0.195
],
[
3.25,
0.192
],
[
3.3,
0.189
],
[
3.35,
0.186
],
[
3.4,
0.184
],
[
3.45,
0.181
],
[
3.5,
0.178
],
[
3.55,
0.176
],
[
3.6,
0.173
],
[
3.65,
0.171
],
[
3.7,
0.169
],
[
3.75,
0.166
],
[
3.8,
0.164
],
[
3.85,
0.162
],
[
3.9,
0.16
],
[
3.95,
0.158
],
[
4,
0.156
],
[
4.05,
0.154
],
[
4.1,
0.152
],
[
4.15,
0.15
],
[
4.2,
0.149
],
[
4.25,
0.147
],
[
4.3,
0.145
],
[
4.35,
0.143
],
[
4.4,
0.142
],
[
4.45,
0.14
],
[
4.5,
0.139
],
[
4.55,
0.137
],
[
4.6,
0.136
],
[
4.65,
0.134
],
[
4.7,
0.133
],
[
4.75,
0.131
],
[
4.8,
0.13
],
[
4.85,
0.129
],
[
4.9,
0.127
],
[
4.95,
0.126
],
[
5,
0.125
],
[
5.05,
0.124
],
[
5.1,
0.122
],
[
5.15,
0.121
],
[
5.2,
0.12
],
[
5.25,
0.119
],
[
5.3,
0.118
],
[
5.35,
0.117
],
[
5.4,
0.116
],
[
5.45,
0.115
],
[
5.5,
0.113
],
[
5.55,
0.112
],
[
5.6,
0.111
],
[
5.65,
0.11
],
[
5.7,
0.109
],
[
5.75,
0.109
],
[
5.8,
0.108
],
[
5.85,
0.107
],
[
5.9,
0.106
],
[
5.95,
0.105
],
[
6,
0.104
],
[
6.05,
0.103
],
[
6.1,
0.102
],
[
6.15,
0.101
],
[
6.2,
0.101
],
[
6.25,
0.1
],
[
6.3,
0.099
],
[
6.35,
0.098
],
[
6.4,
0.098
],
[
6.45,
0.097
],
[
6.5,
0.096
],
[
6.55,
0.095
],
[
6.6,
0.095
],
[
6.65,
0.094
],
[
6.7,
0.093
],
[
6.75,
0.092
],
[
6.8,
0.092
],
[
6.85,
0.091
],
[
6.9,
0.09
],
[
6.95,
0.09
],
[
7,
0.089
],
[
7.05,
0.089
],
[
7.1,
0.088
],
[
7.15,
0.087
],
[
7.2,
0.087
],
[
7.25,
0.086
],
[
7.3,
0.085
],
[
7.35,
0.085
],
[
7.4,
0.084
],
[
7.45,
0.084
],
[
7.5,
0.083
],
[
7.55,
0.083
],
[
7.6,
0.082
],
[
7.65,
0.082
],
[
7.7,
0.081
],
[
7.75,
0.081
],
[
7.8,
0.08
],
[
7.85,
0.08
],
[
7.9,
0.079
],
[
7.95,
0.079
],
[
8,
0.078
],
[
8.05,
0.077
],
[
8.1,
0.076
],
[
8.15,
0.075
],
[
8.2,
0.074
],
[
8.25,
0.073
],
[
8.3,
0.072
],
[
8.35,
0.072
],
[
8.4,
0.071
],
[
8.45,
0.07
],
[
8.5,
0.069
],
[
8.55,
0.068
],
[
8.6,
0.068
],
[
8.65,
0.067
],
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