How to use AccuGPSMeasure

1. Overview

As the name suggest this app takes Accurate GPS Measurements. Due to which AccuGPSMeasure allows you to: .

✅ Measure distances (lengths) with high accuracy

✅ Calculate land areas (polygons) with high accuracy

✅ Generate highly accurate KML files for use in Google Earth, GIS software, and other mapping tools

Best for: Field surveys, land measurement, forestry, agriculture, and any application requiring precise GPS-based measurements.

2. Key Features

✔ Abolutely free - The app is totally free ( supported by Ads, that also minimally), without any limitations,does not collect any personal information,does not need any login, does not need to be installed like any mobile app, works well on any modern browser.

✔ Accuracy with Simplicity - Accurate yet even a layman can operate easily.

✔ Sub-meter Accuracy – Averages multiple GPS readings for reliable measurements. For 300 readings sub meter accuracy is achieved in most of the cases.

✔ Customizable Sampling – Adjust the number of readings per point (default: 30).

✔ Three Export Options – Generate KML files for:

- Points (Waypoints)

- Lines (Paths)

- Polygons (Areas)

✔ Real-time Confidence Indicator – Shows GPS accuracy (standard deviation in meters). This helps in deciding whether to keep the reading or discard it.

3. How to Use AccuGPSMeasure

Step 1: Prepare Your Device

- Enable High-Accuracy GPS (Settings > Location > High Accuracy Mode).

- Stay in Open Areas – Avoid tall buildings, dense forests, or valleys for best results.

- Keep the Device Steady – Movement affects accuracy.

Step 2: Capture Points

1. Enter a Track Name (e.g., "Field Survey 1").

2. Set Number of Readings (Default: 30; higher = more accuracy but slower).

3. Press "Start Capture" – The app will collect GPS data for 30 sec (or your chosen duration).

4. Review the Data – The app shows:

- Average coordinates

- Confidence level (standard deviation in meters)

5. Save or Discard –

- ✅ Save Waypoint → Adds to your track.

- ❌ Discard Waypoint → Restarts capture.

Step 3: Measure Length & Area

- After saving 2+ points, the app calculates:

- Total Length (in meters)

- Area (in m², if 3+ points form a polygon).

Step 4: Export KML

- Export as Points (Markers for each waypoint).

- Export as Line (Connects all points in order).

- Export as Polygon (Closes the loop for area calculation).

4. Accuracy Tips

🔹 For Best Results:

- Use 50+ readings per point in areas with weak GPS signals.

- Stand still during capture (movement reduces accuracy).

- Avoid bad weather (heavy clouds/rain degrade GPS signals).

🔹 Typical Accuracy:

- Open Sky: 0.5–3 meters (with 30 readings).

- Urban/Dense Forest: 3–10 meters (use more readings).

- Sub meter accuracy is possible with 300 readings ( or 5 minutes)

5. Troubleshooting

❌ "GPS signal lost" → Move to an open area.

❌ Inaccurate measurements → Increase the number of readings.

❌ KML not loading in Google Earth → Ensure the file has a `.kml` extension.

6. Safety & Best Practices

⚠ Do not rely solely on GPS for legal land disputes (use professional survey tools when needed).

⚠ Carry a backup power bank – GPS usage drains battery quickly.

⚠ Verify measurements by walking the path if possible.

7.Are mobile GPS accuarte?

The general misconception that mobile GPS is not very accurate, is no more true. Any modern mobile device having Dual Band (L1+L5) GNSS capabilitiy is equally accurate than any non-DGPS or RTK corrected hand held GPS device. And if we take AGPS ( Assisted GPS) technology used in mobile they prove to be more accurate in field if used by non-technical persons.

8.What is Assisted GPS (A-GPS) technology

Normally, your device listens to whispers from far-off satellites to figure out exactly where you are. This 'first lock' can take one to a few minutes on a traditional handheld GPS.Assisted GPS (A-GPS) is like your phone getting a cheat sheet from the cell tower or Wi-Fi network. This cheat sheet tells it roughly where the satellites are. So, instead of figuring everything out from scratch, your phone gets a head start, allowing it to 'lock' onto your location in just a few seconds (3-5 seconds), even indoors. It's much quicker because it has 'assistance' from the network.For a non-technical person, who often moves quickly after getting the first reading, this rapid initial lock makes mobile GPS appear more accurate and reliable in everyday use

9 . List of mobiles with most accurate GPS: While in general all mobile GPS are good enough for the purpose of this app, the most accurate mobile GPS devices are typically flagship smartphones from major manufacturers that incorporate dual-frequency GNSS receivers (L1+L5) and support a wide array of satellite constellations. This technology significantly reduces errors from multipath and atmospheric interference, leading to more consistent and precise positioning (often in the 1-3 meter range in ideal conditions).

Here's a list of smartphone series that are known for, or are highly likely to feature, advanced and more accurate GPS capabilities (especially their more recent models):

  1. Apple iPhone Pro Series (e.g., iPhone 14 Pro, iPhone 15 Pro, and newer):

    • Apple has consistently improved its location services, and their Pro models are among the first to integrate advanced GNSS capabilities, often including dual-frequency support.

  2. Samsung Galaxy S Series (e.g., Galaxy S22, S23, S24 Ultra, and newer):

    • Samsung's top-tier Galaxy S and Ultra models, especially those featuring the latest Qualcomm Snapdragon (e.g., "for Galaxy" versions) or Samsung Exynos chipsets, typically include sophisticated dual-frequency GNSS receivers and multi-constellation support.

  3. Google Pixel Series (e.g., Pixel 7 Pro, Pixel 8 Pro, and newer):

    • Google's own Pixel phones, particularly their "Pro" variants, are known for excellent software integration and often utilize the latest Qualcomm modems (or Google's custom Tensor chips which include advanced GNSS capabilities), providing strong location performance.

  4. Xiaomi Flagship Series (e.g., Xiaomi 12 Pro, Xiaomi 13 Pro, Xiaomi 14 Ultra, and newer):

    • Xiaomi has been a leader in adopting dual-frequency GNSS in many of its high-end and even some mid-range phones, offering excellent value for positioning performance.

  5. OnePlus Flagship Series (e.g., OnePlus 10 Pro, OnePlus 11, OnePlus 12, and newer):

    • OnePlus often incorporates top-tier Qualcomm chipsets in their flagship devices, which include the most advanced GNSS modules available.

Key Technology to Look For:

When purchasing a new phone, if GPS accuracy is a priority, look for specifications that mention:

  • Dual-frequency GNSS: Specifically, support for L5 (GPS) and/or E5a (Galileo) alongside the standard L1/E1.

  • Multi-constellation support: Explicit mention of GPS, GLONASS, Galileo, BeiDou, and QZSS.

  • The latest Qualcomm Snapdragon or MediaTek Dimensity flagship chipsets, as these often integrate the most advanced GNSS receivers.