Delorme PN-20 User Manual download pdf (Page 18)

Mapping Assets in the Field

Up-to-datemapsareoftencriticaltoefcientlymanageandmaintaincompanyassets.Youmay

needseverallayersofinformationtolocateandupdateinformationabouttheseassetsintheeld,

suchasroad,topographic,andhistoricmaps,aswellashigh-resolutionaerialimageryandGISlay-

ers.TheEarthmateGPSPN-20isideallysuitedtohandletheseneeds;youcantransfervirtuallyany

typeofdatafromDeLormesoftwareontothedeviceforuseintheeld,andthenusetheEarthmate

GPSPN-20tomapnewassetsandtheconditionsofexistingassets.Youcanthenbringthisinfor-

mationbackintotheofcetoupdatethecentraldatabase.

The division managers of a utility company are responsible for overseeing the bimonthly update of

the spatial database for each division. They must collect information regarding new line locations,

conditions, and areas requiring repair or replacement to update the database and assist in planning

for the next month’s maintenance schedule.

The company uses the Earthmate GPS PN-20 with DeLorme’s professional XMap

GIS software

to perform the updates. Each division is divided into quadrants with crews of two assigned to each

quadrant. Each crew has an Earthmate GPS PN-20 and is responsible for uploading the maps and

data they need on the device before heading out into the eld. This data includes an updated copy of

the quadrant’s GIS utility line layer, road and topographic maps, waypoints of pole mile markers, high-

resolution aerial imagery downloaded from the state GIS department, and digitally scanned paper

maps of utility line schematics. These maps are geo-registered to the DeLorme map using XMap.

Preparing data for and transferring data onto the Earthmate GPS PN-20

1. Open XMap, set up a subscription to the central database, and obtain an updated copy of the

utility layer for the division.

2. Load the GIS layer into the GIS tab and use the spatial query tool to isolate the line objects

within a particular quadrant.

3. From the ImageReg tab, open the digital image of the schematic map for the quadrant. Use

the GIS line layer as reference to place points on the digital image that correspond to points

on the DeLorme map. Then, process the image to geo-register it to the map.

4. Visit the state GIS website and download any digital aerial imagery in .sid or .tiff format that

corresponds to the quadrant. Use the Map Data tab to load the imagery into XMap.

Scenarios

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 92 93

No comments

Delorme PN-20 User Manual Page 18