iso 9001 Certified

EZSurvTM

GNSS POST-PROCESSINGSOFTWARE

EZSurv software is an open and complete solution
designed to easily and reliably process raw GPS andGLONASS data. This software product is intended forusers who care about accurate results, without having
to set numerous scientific parameters.
TM

COORDINATE SYSTEM
EZSurv ’s Mapping Systems tool provides complete coordinate-system
support. Over 62 standard datums and 22 standard ellipsoids arepredefined. Additionally, you can create your own user-defined datums
and ellipsoids. There are also over 12 different map projection templates
from which you can derive most mapping systems used in the world.
The US State-Plane Coordinate System is fully supported, and local grids
can be defined.
TMRIGOROUS PROCESSING ENGINE
EZSurv uses the latest GNSS processing techniques to get the mostout of your GNSS data. Depending on your fieldwork methodology,
the software will process any of the following modes:• Static• Rapid static• Stop and go• Kinematic• Semi-kinematic• OTF (for single and dual frequency receivers)
TMAll processing is fully automated. Baseline and trajectory computationcan be launched in batch mode (as many baselines and trajectories
as you want). Advanced users can adjust various processing parameters
to meet special requirements.

BASE STATION DATA
The basic idea of GNSS post-processing is to analyze nearby base station (fixedstation) data along with your GNSS rover data in order to improve accuracy.
EZSurv automates this task to facilitate data processing. EZSurv automaticallysearches the Internet for the best GNSS base station that fits your field data. Thissearch is performed on a number of existing GNSS networks around the world.
Post-processing your data is handled automatically by pressing a single key. All
you need is an Internet connection. If you maintain your own GNSS network, it
could be easily incorporated into the search through a LAN connection.
TMTM

The data rate of your base station is no problem since EZSurv can automatically
perform a polynomial interpolation (up to 60 sec.).
TMIMPORTING MULTIPLE DATA FORMATS
Importing GNSS datasets is straightforward since you can easily drag and drop
files into the observations window to quickly see their descriptions and attributes.
To avoid long conversion processes, EZSurv™ directly supports raw binary
formats from several manufacturers as well as the receiver independentexchange format (RINEX).

© 2008 VGI Solutions. All rights reserved // EZSurv _eng_10-08 // v2.0
TM

QUALITY CONTROL
Various tools are included for quality control:• Editing of GNSS data file properties• Graphical representations of phase or code residuals• Graphical tools to help analyze cycle-slip occurrences in data
• Loop closure utilities for users creating networks of baselines• Common vector analysis• Least Squares Adjustment to adjust network of baselines

COMPATIBLE DATA ACQUISITION SOFTWARE
When you are using EZTag CE or EZField data collection software,
EZSurv becomes a powerful companion product to handle yourfield data. EZTag CE is designed for GNSS/GIS data acquisition; itlets you collect features and attributes that are displayed in EZTag CE
powerful PlanView along with vector and raster maps. EZField isdesigned for accurate surveying data acquisition with GNSS receivers.
TM

TM

TM

TM

TM

TM

Features
POST-PROCESSED ACCURACY
RECEIVERKINEMATICAUTOMATED PROCESSSEMI KINEMATIC

STATIC

Baseline definition from imported static files

OTF

Single frequency

submeter , subfootcentimeter

centimeter

centimeter

Trajectory definition from imported rover files

Dual frequency

N/A

centimeter7

N/A

centimeter8

Internet scan to detect base station data that fits rover files

1234,56

Outlier detection (bad data elimination)

SUPPORTED GNSS DATA FORMATS

Algorithm to reduce data noise

Rinex v2.10

Any GNSS receivers

Ambiguity smoothing

Hemisphere GPSAll products

Base station data interpolation

Magellan

DG14, ProMark 500

Ambiguity fixing

NavComAll products

Semi-kinematic processing for L1 data when EZField data collection software is used

NovatelAll products

Baseline batch processing

Septentrio

All products

Trajectory batch processing

Ublox

TIM-LH, LEA-4T, LEA-5T

TMRigorous least-squares for network adjustment

VIEW

QA TOOLS

Plan view to graphically analyze your survey

Common vector analysis report

Project Manager view to manage your data with archive capability

Loop closure report (closed and open loop)
Process summary report

GRAPHICAL ANALYSIS

Baseline summary report

Number of satellites in view in a file

Trajectory summary report

Satellite by satellite visibility in a fileNetwork adjustment summary report

Cycle-slip display

Residuals plot

Point and baseline error ellipse from Least Squares adjustment

AVAILABLE VERSIONSStandardized Residual Histogram (from Least Squares adjustment)

EZSurv LiteTM

DATA EDITING•

Submeter/Subfoot

Site name, coordinates, antenna height and antenna model

Static L1 fixe

Coordinates systems and geoid models
Time spanOTF L1

Total or partial satellite segment elimination

Static L1/L2 fixe

TMEZSurv L1L2TM••••••••OTF L1/L2

Export raw data in standard RINEX format

EZSurv L1Each version is available with full GNSS capability or GPS only.

1.	Horizontal accuracy (HRMS). Requires 5-10 minutes of continuous
tracking with at least 5 satellites and a PDOP better than 6. Multipath
and ionospheric effects can affect final accuracy. Base station separation
may affect accuracy by about 5 ppm (depending on the quality of thebase station data).
2.	Horizontal accuracy (HRMS). Requires 15-20 minutes of continuous
tracking with at least 5 satellites and a PDOP better than 6. Multipath
and ionospheric effects can affect final accuracy. Base station separation
may affect accuracy by about 5ppm (depending on the quality of thebase station data).

EZSurv
Printed in CanadaTM

3.	Horizontal baseline accuracy (HRMS). Requires 15-30 minutes of gooddata on a minimum of 4 satellites and a PDOP better than 6. Multipath
and ionospheric effects can severely affect final accuracy. This horizontal
accuracy usually translates into 1cm +/- 2 ppm.

6.	Horizontal accuracy (HRMS). Requires 45 minutes of continuous tracking
with at least 5 satellites and a PDOP better than 6. Base station must
be within 10 km. Multipath and ionospheric effects can affect this accuracy.
This horizontal accuracy usually translates into 2 cm +/- 2 ppm.

4.	Requires L1 frequency receiver that outputs quality code, Doppler andcarrier phase observations along with reliable real-time cycle-slip detection.

7.	Static results require only 5-10 minutes of data to achieve centimeter
accuracy. This horizontal accuracy usually translates into 1cm +/- 1 ppm(with good dual frequency data).

5.	EZField data collection software is designed to ease the semi-kinematicprocess. It allows you to easily initialize on an initialization bar or aknown point.
TM8.	OTF requires approximately 30 seconds of continuous tracking withat least 5 satellites and a PDOP better than 6. Multipath and ionosphericeffects can affect final accuracy. This horizontal accuracy usuallytranslates into 2 cm +/- 2 ppm.

OnPOZ Precision Positioning is a division of VGI Solutions. EZTag CE and EZField are recognized trademarks of VGI Solutions.
EZSurv is a registered trademark of VGI Solutions. All other trademarks are the property of their respective owners.
TMTM

TM

P 514 495.0018