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<h1 class="title toc-ignore">NYC Crime Data</h1>
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<p><br></p>
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<div id="accessing-the-data" class="section level3">
<h3>Accessing the Data</h3>
<p>In this page, we show how we accessed the data and the kinds of data cleaning and manipulation done to make the data ready for analysis. The data is compiled by <a href="https://www1.nyc.gov/site/nypd/index.page">New York City Police Department</a> and owned by <a href="https://opendata.cityofnewyork.us/">NYC OpenData</a>. <br></p>
<p>The data was accessed through the SoDA (Socrata Open Data Application Program Interface) web API client on 17th November, 2018. Click <a href="https://dev.socrata.com/consumers/getting-started.html">here</a> to read more about the API.</p>
<p>Click <a href="https://github.com/aminyakubu/nyc-crime/blob/master/acquiringdata.Rmd">here</a> to view the full R code used to access, clean and manipulate the data. <br></p>
<p><code>RSocrata</code> package is needed to to use SoDA web API query. <code>ggmap</code> is also needed to geocode coordinate information. Standard packages like <code>tidyverse</code> and <code>lubridate</code> are also necessary for manipulation.</p>
<p>The raw, acquired dataset has 6,036,805 observations and 35 variables. Broadly speaking, the variables contain information on the exact date, time and location of crime, description of crime, demographic information of the victim and suspect, and police department infromation. For more information on the variables, click <a href="https://data.cityofnewyork.us/Public-Safety/NYPD-Complaint-Data-Historic/qgea-i56i">here</a>.</p>
<p><br></p>
</div>
<div id="subsetting-data" class="section level3">
<h3>Subsetting Data</h3>
<p>We were interested in 2017, 2016, 2015 and 2014 and felony sex-related, weapon-related and drug-related crimes. Therefore, we extracted those crime information for those years.</p>
<p>Below is a list of the penal codes in the dataset that we used to selected the felony crimes of interest.</p>
<div id="sexual-related-felony-crimes" class="section level5">
<h5>Sexual – Related Felony Crimes <br></h5>
<p><code>178</code> Facilitating A Sex Offense With A Controlled Substance <br> <code>694</code> Incest <br> <code>697</code> Use Of A Child In Sexual Performance <br> <code>176</code> Sex Crimes <br> <code>180</code> Course Of Sexual Conduct Against Child <br> <code>153</code> Rape 3 <br> <code>157</code> Rape 1 <br> <code>177</code> Sexual Abuse <br> <code>168</code> Sodomy 1 <br> <code>159</code> Rape 1 Attempt <br> <code>166</code> Sodomy 2 <br> <code>164</code> Sodomy 3 <br> <code>179</code> Aggrevated Sexual Abuse <br> <code>155</code> Rape 2 <br> <code>586</code> Sextrafficking <br> <code>696</code> Promoting Sexual Performance – Child <br></p>
</div>
<div id="drug-related-felony-crimes" class="section level5">
<h5>Drug Related Felony Crimes <br></h5>
<p><code>500</code> Controlled Substance, Possession <br> <code>501</code> Controlled Substance, Possession <br> <code>502</code> Controlled Substance, Possession <br> <code>503</code> Controlled Substance, Intent To <br> <code>505</code> Controlled Substance, Possession <br> <code>507</code> Controlled Substance, Possession <br> <code>510</code> Controlled Substance, Intent T <br> <code>512</code> Controlled Substance, Sale 1 <br> <code>514</code> Controlled Substance, Sale 2 <br> <code>515</code> Controlled Substance, Sale 3 <br> <code>519</code> Sale School Grounds 4 <br> <code>520</code> Controlled Substance, Sale 4 <br> <code>521</code> Controlled Substance, Sale 5 <br> <code>523</code> Sale School Grounds <br> <code>524</code> Controlled Substance, Possession<br> <code>529</code> Sales Of Prescription <br> <code>530</code> Drug, Injection Of <br> <code>531</code> Drug Paraphernalia, Possessesion <br> <code>532</code> Controlled Substance,Possession <br> <code>568</code> Marijuana, Possession 1, 2 & 3 <br> <code>570</code> Marijuana, Sale 1, 2 & 3 <br></p>
</div>
<div id="weapon-related-felony-crimes" class="section level5">
<h5>Weapon Related Felony Crimes</h5>
<p><code>781</code> Criminal Disposal Firearm 1 <br> <code>792</code> Weapons Possession 1 & 2 <br> <code>793</code> Weapons Possession 3 <br> <code>796</code> Weapons,Prohibited Use <br></p>
<p>The resulting dataset called <code>sex_drug_weapons</code> dataset has 46,692 observations and 15 variables.</p>
<p><br></p>
</div>
</div>
<div id="reverse-geocoding" class="section level3">
<h3>Reverse Geocoding</h3>
<p>The dataset comes without zipcode or neighborhood information; there are only coordinates of the exact location where the crime happened. This makes aggregation beyond clustering of the geographic points impossible. Therefore we used google maps API to reverse geocode the get the exact address of the crime occurence. We then subsequently took out the zipcodes for mapping. The full code on how we reverse geocoded the longitude and latitude information can be found in our repository on github.</p>
</div>
<div id="usage" class="section level3">
<h3>Usage</h3>
<p>After cleaning, subsetting and reverse geocoding, we saved the resulting dataset in <code>rds</code> format. You can download the resulting datasets <a href="https://drive.google.com/open?id=1QZB8nKClFl9qZV20Sa15Lf7ZbIlxBcis">from this google drive</a>. The code on how to read the datasets can also be found in our repository file called <a href="https://github.com/aminyakubu/nyc-crime/blob/master/acquiringdata.Rmd"><code>acquiringdata.Rmd</code></a></p>
</div>
<div id="data-dictionary" class="section level3">
<h3>Data Dictionary</h3>
<p>The list below provides all 17 variables in the datasets with their brief descriptions:</p>
<p>
<code>cmplnt_num</code>: randomly generated persistent ID for each complaint <br>
<p>
<code>boro_nm</code>: the name of the borough in which the incident occurred <br>
<p>
<code>cmplnt_fr_dt</code>: exact start date of occurrence for the reported incident <br>
<p>
<code>cmplnt_to_dt</code>: exact end date of occurrent for the reported incident <br>
<p>
<code>cmplnt_fr_tm</code>: exact time of occurrence for the reported incident <br>
<p>
<code>latitude</code>: midblock latitude coordinate for Global Coordinate System, WGS 1984, decimal degrees (EPSG 4326) <br>
<p>
<code>longitude</code>: midblock longitude coordinate for Global Coordinate System, WGS 1984, decimal degrees (EPSG 4326) <br>
<p>
<code>ky_cd</code>: three-digit offense classification code <br>
<p>
<code>ofns_desc</code>: description of offense corresponding with key code <br>
<p>
<code>pd_cd</code>: three-digit internal classification code (more granular than Key Code) <br>
<p>
<code>pd_desc</code>: description of internal classification corresponding with PD code <br> <code>vic_race</code>: victim’s race description <br>
<p>
<code>vic_sex</code>: victim’s sex description (D=Business/Organization, E=PSNY/People of the State of New York, F=Female, M=Male) <br>
<p>
<code>year</code>: year the incident occurred <br>
<p>
<code>prem_typ_desc</code>: specific description of premises; grocery store, residence, street, etc. <br>
<p>
<code>crime_group</code>: sex-related felony offenses, drug-related felony offenses, weapon-related felony offenses <br>
<p>
<code>zip</code>: reverse geocoded address of the incident <br>
<p>
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