Surveying

HOW DO I CONVERT NGVD29 TO NAVD88?
HOW DO I CONVERT OLD SURVEYS TO NAVD88?
MY HANDHELD GPS GIVES ME BAD ELEVATIONS. WHY?
WHAT KIND OF GPS RECEIVER DO I NEED?
CAN I USE MY SINGLE FREQUENCY SURVEY GRADE GPS RECEIVERS FOR ELEVATIONS?
IS THERE A MORE COST-EFFECTIVE USE FOR GPS SURVEYING?

Real-Time Network

WHAT IS C4GNET.XYZ REAL-TIME NETWORK?
CAN SOLAR STORMS MESS UP MY RESULTS?
I CAN'T CONNECT. AM I BEING JAMMED?
I CAN’T CONNECT, HAS MY LOGIN BEEN TURNED OFF?
I CAN’T CONNECT, IS THERE SOMETHING GOING ON WITH THE NETWORK TODAY?
WHAT CAN I DO IN A POOR CELL ENVIRONMENT?
ARE YOU DOING MAINTENANCE ON THE SYSTEM RIGHT NOW?
I FORGOT MY USERNAME AND/OR PASSWORD, CAN YOU GIVE THEM TO ME AGAIN?
MY LOGINS ARE OK, AND THE NETWORK LOOKS OK, WHY CAN’T I CONNECT?
MY POSITIONS ARE OFF BY SEVERAL FEET, WHAT’S UP?
MY POSITIONS ARE OFF BY SEVERAL TENTHS COMPARED TO PUBLISHED CONTROL VALUES. WHAT’S UP?
WHAT DATUM, OR REFERENCE FRAME DOES C4Gnet.XYZ WORK IN?
DOES C4Gnet.XYZ PROVIDE ME WITH STATE PLANE COORDINATES?
DOES C4Gnet.XYZ PROVIDE GRID OR GROUND?
DOES C4Gnet.XYZ PROVIDE PROJECTIONS?
WHAT HARDWARE AND SOFTWARE ARE NEEDED TO USE C4Gnet.XYZ?
WHAT IS NTRIP?
WHAT DO YOU MEAN BY VRS, PPP, AND NSB?
CAN YOU HELP ME SET UP MY ROVER?
WHERE DO I FIND THE CURRENT POSITIONS OF THE STATIONS (e.g., FOR POST-PROCESSING)?
WHAT DO THE DIFFERENT COLOR DOTS ON THE SENSOR MAP INDICATE?
WHY IS THAT STATION DOWN?
IS C4Gnet.XYZ multi-constellation?
WHAT DOES ‘MSM’ MEAN?
CAN I TRY OUT C4Gnet.XYZ?
WHY ARE THERE SO MANY DIFFERENT MOUNTPOINTS ON THE LIST?
IS SINGLE BASE BETTER THAN VRS?
WHEN I CONNECT TO VRS, SOMETIMES I SEE LESS SATELLITES, WHY IS THIS?
HOW WILL THE DEPRECATION OF THE U.S. SURVEY FOOT AFFECT C4Gnet.XYZ?
WHAT KIND OF RESULTS SHOULD I EXPECT USING C4Gnet.XYZ?
WHAT ARE C4Gnet.XYZ PLANS FOR THE UPCOMING NATIONAL DATUM SHIFT?
HOW DO I SUBSCRIBE TO C4Gnet.XYZ?
DOES C4Gnet.XYZ HAVE AN AUTOMATED POST-PROCESSING SERVICE?
CAN I USE THE WSRN FOR MY DRONE OPERATIONS?
HOW FAR OUTSIDE OF THE NETWORK CAN I USE IT?
WHERE CAN I FIND CONTROL POINTS TO CHECK INTO?

Louisiana Spatial Reference Center (LSRC)

IS NGVD29 THE SAME AS MEAN SEA LEVEL?
WHY DID WE SWITCH FROM NGVD29 TO NAVD88?
WHY DID THE ELEVATIONS CHANGE WHEN WE SWITCHED TO NAVD88?
DID WE SINK THAT MUCH?
WHAT IS THE CONVERSION FROM NGVD29 TO NAVD88?
Can’t I use CorpsCon to convert survey data from NGVD29 to NAVD88?
WHAT IS A DATUM AND AN EPOCH?
OK, AGAIN, WHAT IS AN EPOCH?
WHY DOESN’T MY BENCHMARK SHOW UP ON THE NGS WEBSITE?
WHAT DOES THIS 2004.65 EPOCH MEAN?
WHY IS THE ELEVATION ROUNDED TO THE 0.1 FOOT ON THE NGS DATASHEET?
IS GPS MORE ACCURATE THAN LEVELS?
WHAT IS MLLW AND HOW DO I USE IT?
WHO ELSE HAS SUBSIDENCE PROBLEMS (TEXAS?) AND WHAT ARE THEY DOING ABOUT IT?

Continuously Operating Reference Stations (CORS)

HOW CAN I GET AN ACCURATE, UP-TO-DATE ELEVATION?
HOW DO I GET RINEX FILES FOR POST-PROCESSING?
WHAT IS VIRTUAL RINEX STATION?