Every record from the field, straight into your report tables
Ursa makes the field recording app and report engine for ecological survey and EIA teams. Surveyors tap once per sighting on the transect; back at the office the species list, diversity indices and editable Word and Excel reports are ready.
| Species | Tally | Count |
|---|---|---|
| Eurasian tree sparrowPasser montanus | 17 | |
| Light-vented bulbulPycnonotus sinensis | 13 | |
| Swinhoe's white-eyeZosterops simplex | 9 | |
| Black bulbulHypsipetes leucocephalus | 5 | |
| Little egretEgretta garzetta | 3 | |
| Taiwan blue magpieUrocissa caerulea | 2 |
- Species S
- 6
- Individuals N
- 49
- H′ (ln)
- 1.565
- H′ (log₁₀)
- 0.680
- Evenness J′
- 0.873
4 ecological consulting firms in Taiwan use Ursa under contract
Surveyors record in the field, team leads review in the office, and the report is built from the same data.
Free ecology tools
Everything is calculated in your browser, and your data never leaves your computer. Protected-species locations and unpublished survey data are safe to paste.
Diversity index calculator
Paste species and counts to get Shannon-Wiener H′ (ln, log₁₀ and log₂ side by side), Pielou evenness, Simpson and Margalef, per zone if you need it.
Table → indicesUTM and WGS84 coordinate converter
Convert between latitude/longitude and UTM anywhere in the world, one point or a whole column at once. The zone is picked for you, Norway and Svalbard exceptions included.
Coordinates → coordinatesPhoto location remover
Strip GPS and camera data from JPEG photos before you share them. Image quality and orientation stay the same, so sensitive species locations do not leak.
JPEG → JPEGPlant quadrat calculator
From DBH or girth to basal area per hectare, diameter classes, and relative density, dominance and frequency with the importance value (IVI).
Tree list → plot statistics
How survey data is protected
Companies are fully separated
Every record belongs to one company, and every query is scoped to it: company A cannot see company B's data.
Multi-tenantRecords on the phone are encrypted
Surveyors can record without a signal; the data is kept on the phone with AES-256 encryption and synced once there is a connection.
Offline, encryptedCoordinates stay out of the logs
Locations of protected species are confidential, so system logs never record coordinates in plain text.
Location privacy
Frequently asked questions
Should the Shannon-Wiener index use ln or log₁₀?
Both appear in the literature, and the values differ by a factor of ln 10 ≈ 2.3026, so a report must state the base, and older values must be converted before they are compared. Pielou evenness J′ does not depend on the base. In Taiwan, the revised ecological assessment guidelines for EIA documents and monitoring reports use the natural logarithm from 1 December 2026. Diversity index calculator
How are the locations of protected species kept confidential?
Records in the app are stored on the phone with AES-256 encryption. Every record belongs to one company and every query is scoped to it, so one company can never see another's data. System logs never record coordinates in plain text. Before sharing survey photos, strip their GPS data. Photo location remover
Can surveyors record without a signal?
Yes. Species records are encrypted and kept on the phone, then synced to the cloud with one tap once there is a connection.
Do the free tools on this site upload my data?
No. Every calculation runs in your browser, and the site's security policy stops pages from sending data to any other server. The site uses no cookies and no tracking. Privacy policy
Which devices does the app run on, and in which language?
iPhone, iPad, and Android phones and tablets; in the office, the web review version runs in a desktop browser. The app's interface is in Traditional Chinese today, and it is available to survey teams under contract.
How are records split between the project area and the adjacent area?
Surveyors switch between project area and adjacent area on the recording screen, and every record they add is tagged with the current area. The tag can be corrected record by record afterwards, and statistics are calculated per area.